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Introduction

You ask another boat owner on the pontoon how to deal with a maintenance job on your boat. They smile and say, “Just put some grease on it.”

Simple enough.

Then you walk into the chandlery.

Instead of finding a single tube labelled grease, you’re faced with shelves of marine grease, PTFE grease, silicone grease, dielectric grease and copper anti-seize compounds. Some promise exceptional water resistance. Others claim to handle extreme pressure, protect electrical connections or keep rubber seals in good condition. Suddenly, what sounded like a straightforward shopping trip has become confusing.

The good news is that, for most boat owners, a good-quality waterproof marine grease will handle the majority of routine lubrication jobs around the boat. It’s the product you’ll reach for most often, and for many owners it’s the only grease they’ll ever need.

However, a few maintenance jobs genuinely benefit from a specialist product. Silicone grease protects rubber seals without damaging them. Dielectric grease helps keep moisture out of electrical connections. PTFE lubricants are ideal where you want low friction without attracting dirt, while copper anti-seize helps stop threaded fasteners seizing together after years in a harsh marine environment.

The challenge isn’t choosing the most expensive grease on the shelf.

It’s knowing which lubricant is right for the job in front of you.

This guide explains how.

We’ll explain the different types of boat lubricant, when a standard marine grease is all you need, when it’s worth reaching for something more specialised, and how to avoid common lubrication mistakes. We’ve also included a comprehensive boat lubrication lookup covering over two hundred common parts and fittings, so whether you’re servicing a seacock, replacing a water pump filter or maintaining your trailer, you can quickly find the right recommendation—and discover when the best advice is not to lubricate at all.

Stop Looking for the “Best” Grease

It’s tempting to think of grease as a single product that can be used almost anywhere on a boat.

It isn’t.

A trailer wheel bearing, a battery terminal, a hatch seal and a stainless steel bolt all have different maintenance requirements, so it shouldn’t be surprising that they don’t all need the same product.

That’s why “What’s the best marine grease?” is only half the question.

A better one is:

What does this part need?

If you’re trying to protect a heavily loaded bearing from water and corrosion, waterproof marine grease is usually the right answer. If you’re maintaining a rubber seal, silicone grease is more appropriate. Protecting an electrical connection? That’s a job for dielectric grease. Trying to stop a stainless steel fastener seizing together over time? An anti-seize compound is designed specifically for that.

And sometimes the answer is nothing at all. Some components are designed to operate without additional lubrication, and adding the wrong product can do more harm than good.

Most boat owners need fewer different lubricants than they might expect. A good-quality marine grease will deal with many routine lubrication jobs around a typical boat. Specialist products simply fill the gaps where they offer a clear advantage.

Once you stop asking “Which grease is best?” and start asking “What does this part need?”, choosing the right lubricant becomes much easier.

That way of thinking is useful throughout boat ownership, not just when choosing lubricants. It is one of the ideas behind our Understand Your Boat series, which explains how the systems on your boat work and why understanding them usually leads to better maintenance decisions.

The Boat Lubrication Lookup later in this guide then gives you a practical way to apply that thinking. If you know the part but aren’t sure what to put on it, search for the part first. If you want to understand the different lubricant types and why they are used, the sections below explain the reasoning.

Which Boat Lubricant Does What?

The easiest way to choose between the different lubricants in this guide is to start with the component rather than the product.

Marine Grease

For most moving metal components exposed to water, salt and weather, a good-quality waterproof marine grease is the starting point.

It provides lubrication while also helping protect against water, corrosion and wear. Hinges, pivots, bearings, steering linkages and seacocks are typical examples.

For most boat owners, this is the lubricant that will cover the greatest number of routine jobs.

PTFE Grease

PTFE grease combines conventional grease with PTFE, a very low-friction material. It is useful where you want a lubricated surface with less friction rather than simply the maximum load-carrying ability of a conventional grease.

You may already know PTFE from PTFE thread sealing tape used on plumbing fittings. The two products use PTFE for its low-friction properties, but they do different jobs: the tape is used to seal threaded joints, while PTFE grease is used to lubricate moving parts.

It can be a good choice for mechanisms where smooth movement is particularly important.

Dry PTFE Spray

Dry PTFE spray works differently from PTFE grease. Instead of leaving a layer of grease behind, it dries to leave a thin, low-friction coating that doesn’t attract dirt and dust in the same way.

That makes it useful for locks, catches, sliding tracks and other mechanisms where a sticky coating of grease would quickly collect contamination.

If your first thought is “I don’t really want something greasy here”, dry PTFE is often worth considering.

Silicone Grease

Silicone grease is particularly useful for rubber seals, O-rings and many plastic components.

Unlike petroleum-based greases, it won’t normally cause suitable rubber seals to swell or deteriorate. It helps keep them supple, reduces sticking and can make seals easier to remove during future maintenance.

If the job involves protecting a rubber seal rather than lubricating a metal bearing, silicone grease is often the better choice. It can protect the seal itself, but it won’t repair damaged sealant or stop a leaking hatch or window.

Dielectric Grease

Despite the name, dielectric grease is not there to improve the electrical conductivity of a connection.

It is an electrical insulator. Its job is to help keep moisture, salt and oxygen away from an electrical connection once it has been made, reducing the opportunity for corrosion around the terminals.

It’s particularly useful where electrical connections are exposed to damp or salt-laden conditions. If you’d like to understand how those connections fit into the wider electrical system, our Electrical Systems Hub explains how power moves around a boat and where components such as battery terminals, bus bars and fuses fit into the bigger picture.

Copper Anti-Seize

Copper anti-seize isn’t really a lubricant in the normal sense.

Its job is to help prevent threaded fasteners galling, corroding or seizing together over time. That makes it useful on stainless steel bolts, adjustment threads and other fasteners that may need to be dismantled years after they were installed.

If you’ve ever had to cut off a seized bolt, you’ll appreciate why keeping a small tub in the toolbox can be worthwhile.

Light Machine Oil

Sometimes grease is simply too thick.

Small spring-loaded mechanisms often contain tiny moving parts that need to move freely, and a heavy grease can slow them down or interfere with their operation. Light machine oil provides lubrication without leaving the same heavy coating.

Winch pawls are a good example, and many manufacturers specifically recommend oil rather than grease for these mechanisms.

The important point is that these products are not interchangeable versions of the same thing. Each solves a slightly different maintenance problem, and choosing between them is usually easier once you start with the component and what it needs.

Improvisation Has Its Place

Most boat owners have improvised at some point. A squirt of washing-up liquid helps sail slugs slide into the mast. Candle wax frees a sticky drawer. A dab of engine oil quietens a squeaky hinge. When you’re trying to finish a day’s sailing or get home, making do with what’s already onboard is often part of boat ownership.

The problem comes when temporary fixes quietly become permanent ones. Washing-up liquid dries out, oils attract dirt, and products that weren’t designed as lubricants rarely provide lasting protection against wear or corrosion. They often solve today’s annoyance while creating tomorrow’s maintenance job.

That’s where using the right lubricant begins to pay for itself. It isn’t about avoiding improvisation altogether. It’s about recognising when a quick fix has done its job and replacing it with a solution designed for the way the component is meant to work.

Boat Lubrication Lookup — A searchable reference covering more than 230 common boat maintenance items

Knowing the difference between marine grease, silicone grease and PTFE grease is useful.

Remembering which lubricant belongs on hundreds of different boat parts is another matter entirely.

That’s why we’ve created the Boat Lubrication Lookup.

Use the search box to search more than 230 common boat parts and fittings, each with a recommended lubricant and a brief explanation of why it’s the right choice. In many cases that’ll be a waterproof marine grease. Sometimes it’ll be a specialist product such as silicone grease or dielectric grease. In a surprising number of cases, the best advice is not to lubricate the part at all.

Don’t worry if you can’t find an exact match. Boats vary enormously, and different manufacturers often use different names for similar parts and fittings. Look for something similar instead. Once you understand why a particular lubricant has been recommended, you’ll usually find the same thinking applies elsewhere around your boat.

Treat it as a guide rather than a rulebook. If your equipment manufacturer recommends a specific lubricant or maintenance procedure, always follow their guidance.

If you’re viewing this guide on a phone, rotating your device to landscape will make the table much easier to read.

To make searching easier, the lookup is divided into the following categories:

All General Boat Hardware
Many engineering components are used throughout a boat. They’re listed here because the lubrication recommendation is the same wherever they’re used. Parts and fittings whose maintenance depends on the equipment they’re fitted to are covered within the relevant boat system instead.

Standing Rigging
Standing rigging supports the mast and is normally under constant load. Many of these parts require little routine lubrication, while others should only be lubricated in accordance with the manufacturer’s guidance.

Roller Furling & Running Rigging
These systems contain some of the hardest-working moving parts on a sailing boat. Using the correct lubricant is important because many modern bearing systems are designed to run with little or no grease.

Mast & Spars
Mast and boom fittings are constantly exposed to weather and salt, but many modern sail handling systems use composite bearings that should not be lubricated. Always check the manufacturer’s guidance where appropriate.

Steering
Steering systems are safety-critical. Many exposed pivots benefit from waterproof grease, while cables and composite bearings often have different maintenance requirements.

Engine & Propulsion
Engine and propulsion systems contain a mixture of heavily loaded bearings, rubber seals, precision mechanisms and manufacturer-specific components. Using the wrong lubricant can shorten the life of some parts, so always follow the engine or equipment manufacturer’s maintenance recommendations where appropriate.

Electrical Systems
Electrical systems contain relatively few lubrication points, but the correct product is important. Ordinary grease should never be used where it could affect electrical connections.

Fresh Water System
Fresh water systems contain pumps, taps, filters and seals. Most maintenance involves protecting rubber seals, keeping threaded fittings easy to remove and ensuring moving parts continue to operate smoothly.

Heads (Marine Toilet)
Marine toilets contain a mixture of rubber seals, pistons, valves and moving mechanisms. Many toilet manufacturers recommend silicone-based lubricants for rubber parts.

Hatches, Windows & Companionway
Hatches and windows are constantly exposed to UV, salt and rain. Most maintenance involves protecting hinges, locks and rubber seals rather than heavily lubricating moving parts.

Interior & Accommodation
Interior fittings are generally protected from the weather, so clean lubricants are often preferable to heavier waterproof greases.

Dinghy, Outboard & Davits
These parts and fittings are frequently exposed to salt water and often spend long periods unused. Regular lubrication can help prevent corrosion and keep moving parts operating smoothly.

Boat Trailer
Boat trailers spend much of their lives immersed in fresh or salt water before standing unused for long periods. Corrosion protection is just as important as lubrication.

Tip: You don’t need to browse every category. Simply use the search box above the table to find the part, fitting, boat system or lubricant type you’re looking for. Don’t worry if you’re not sure what a part is called. Try searching for the boat system instead (for example “steering”, “water pump” or “anchor”) and you’ll usually find the right recommendation.

Category	Part / Fitting	Recommended Lubricant	Why Recommended
All General Boat Hardware	Bow shackle pin	Marine Grease	Helps prevent corrosion and makes the pin easier to remove after long periods in a marine environment.
All General Boat Hardware	Clevis pin	Marine Grease	Protects exposed pivot pins from corrosion and makes routine maintenance easier.
All General Boat Hardware	D shackle pin	Marine Grease	Protects stainless steel threads from corrosion and reduces the chance of the pin seizing in place.
All General Boat Hardware	Locking pin	Marine Grease	Protects removable locking pins from corrosion and keeps them operating smoothly.
All General Boat Hardware	Ring-ding pin	Marine Grease	A light coating helps prevent corrosion and keeps removable pins easy to withdraw.
All General Boat Hardware	Snap shackle mechanism	Dry PTFE Spray	Keeps the release mechanism operating freely without attracting grit, salt or dirt.
All General Boat Hardware	Split pin	Do Not Lubricate	Split pins are disposable locking devices and should be replaced if removed, bent or damaged rather than lubricated.
All General Boat Hardware	Stainless steel adjustment threads	Copper Anti-Seize	Reduces the risk of stainless steel threads galling and makes future adjustment easier.
All General Boat Hardware	Swivel shackle swivel	PTFE Grease	Lubricates the rotating joint while resisting water washout.
Anchoring & Mooring	Anchor chain guide roller	Marine Grease	Protects the roller spindle from corrosion and wear.
Anchoring & Mooring	Anchor locker hatch hinge	Marine Grease	Helps exposed hinges resist corrosion and continue operating freely.
Anchoring & Mooring	Anchor roller hinge	Marine Grease	Lubricates folding anchor rollers and helps prevent corrosion around the pivot.
Anchoring & Mooring	Anchor swivel	Marine Grease	Lubricates the swivel while providing long-lasting protection against corrosion.
Anchoring & Mooring	Bow roller bearings	Follow the manufacturer’s guidance	Some bow rollers use plain bushes while others use sealed bearings that should not be lubricated.
Anchoring & Mooring	Bow roller spindle	Marine Grease	Keeps the roller turning freely while protecting the spindle from corrosion and wear.
Anchoring & Mooring	Chain stopper pivot	Marine Grease	Keeps the mechanism operating smoothly while protecting the pivot from corrosion.
Anchoring & Mooring	Fairlead roller bearings	Follow the manufacturer’s guidance	Some fairlead rollers contain sealed bearings that should not be greased.
Anchoring & Mooring	Fairlead roller spindle	Marine Grease	Helps fairlead rollers rotate freely under load while resisting water washout.
Anchoring & Mooring	Folding mooring cleat pivot	Marine Grease	Prevents folding cleats becoming stiff after prolonged exposure to salt water.
Anchoring & Mooring	Windlass bearings	Follow the manufacturer’s guidance	Bearings may be sealed, greaseable or oil-lubricated depending on the windlass design.
Anchoring & Mooring	Windlass clutch cone	Do Not Lubricate	The clutch cone relies on friction to grip correctly. Keep it clean and dry, as lubrication can reduce holding power.
Anchoring & Mooring	Windlass gearbox	Follow the manufacturer’s guidance	Most windlass gearboxes require a specific oil or grease specified by the manufacturer.
Anchoring & Mooring	Windlass main shaft	Marine Grease	Protects exposed shaft surfaces while supporting smooth operation.
Anchoring & Mooring	Windlass manual handle socket	Marine Grease	Prevents corrosion and keeps the handle fitting easy to insert and remove.
Anchoring & Mooring	Windlass operating socket	Marine Grease	A light coating helps protect exposed sockets from corrosion without affecting operation.
Boat Trailer	Brake cable pivots	Marine Grease	Helps exposed pivots continue operating freely.
Boat Trailer	Hitch locking mechanism	Dry PTFE Spray	Keeps locking mechanisms operating freely without attracting grit.
Boat Trailer	Jockey wheel screw thread	Marine Grease	Reduces effort when raising or lowering the trailer while protecting the thread from corrosion.
Boat Trailer	Jockey wheel swivel clamp	Marine Grease	Helps prevent the clamp seizing after prolonged exposure.
Boat Trailer	Overrun brake linkage	Marine Grease	Lubricates exposed pivots while protecting against corrosion.
Boat Trailer	Trailer bearing protectors	Marine Grease	Replenish with the grease recommended by the bearing protector manufacturer.
Boat Trailer	Trailer electrical socket	Dielectric Grease	Protects exposed electrical terminals after connection.
Boat Trailer	Trailer hitch coupling	Marine Grease	Lubricates moving parts and reduces wear between coupling components.
Boat Trailer	Trailer leaf spring bushes	Follow the manufacturer’s guidance	Lubrication depends on the suspension design and bush material.
Boat Trailer	Trailer light board plug	Dielectric Grease	Helps protect electrical contacts from moisture and corrosion.
Boat Trailer	Trailer suspension pivots	Marine Grease	Waterproof lubrication protects heavily loaded exposed pivots.
Boat Trailer	Trailer wheel bearings	Marine Grease	Waterproof marine grease is specifically designed for heavily loaded wheel bearings exposed to water.
Boat Trailer	Trailer wheel nuts	Do Not Lubricate	Wheel nut torque values are normally specified for clean, dry threads. Lubricating the threads can affect the clamping force unless the manufacturer specifies otherwise.
Boat Trailer	Trailer winch gears	Marine Grease	Protects loaded gear teeth from corrosion and wear.
Boat Trailer	Trailer winch pawls	Light Machine Oil	Pawls must move freely to engage correctly. Heavy grease can prevent proper operation.
Boat Trailer	Trailer winch spindle	Marine Grease	Lubricates the main spindle while protecting it from corrosion.
Davits	Davit pivot	Marine Grease	Protects exposed pivots while allowing smooth movement.
Davits	Davit sheave	Follow the manufacturer’s guidance	Sheaves may use plain bushes or sealed bearings depending on design.
Davits	Davit winch gears	Marine Grease	Waterproof grease protects loaded gears from corrosion and wear.
Davits	Davit winch pawls	Light Machine Oil	Pawls require free movement and should not normally be greased.
Davits	Davit winch spindle	Marine Grease	Protects exposed spindle surfaces from corrosion.
Dinghy	Dinghy launching wheel axle	Marine Grease	Protects wheel axles from corrosion and wear.
Dinghy	Dinghy launching wheel pivot	Marine Grease	Lubricates heavily loaded pivots while resisting water washout.
Dinghy	Rowlock pin	Marine Grease	Waterproof grease protects exposed pins from corrosion.
Dinghy	Rowlock socket	Marine Grease	Helps prevent corrosion and makes rowlocks easier to remove.
Electrical Systems	Anderson connector seals	Silicone Grease	Protects rubber seals from drying out and improves weather resistance.
Electrical Systems	Battery switch mechanism	Follow the manufacturer’s guidance	Most switches are sealed and require little or no routine lubrication.
Electrical Systems	Battery switch spindle	Marine Grease	Lubricates external moving parts while protecting against corrosion.
Electrical Systems	Battery terminals	Dielectric Grease	Protects battery terminals from moisture and corrosion after assembly.
Electrical Systems	Electrical enclosure hinges	Marine Grease	Prevents corrosion on exposed metal hinges.
Electrical Systems	Electrical enclosure lock	Dry PTFE Spray	Keeps locks operating smoothly without attracting dirt or salt crystals.
Electrical Systems	Fuse holder cover seal	Silicone Grease	Helps maintain a watertight seal without damaging the rubber.
Electrical Systems	Shore power plug sealing ring	Silicone Grease	Helps keep rubber seals supple while improving water resistance.
Electrical Systems	Shore power socket cover hinge	Marine Grease	Protects exposed hinges from corrosion.
Electrical Systems	Shore power socket latch	Dry PTFE Spray	Keeps latches moving freely without attracting dirt.
Electrical Systems	Solar panel MC4 connector seals	Silicone Grease	Helps protect sealing rings during assembly and disassembly.
Electrical Systems	Waterproof cable gland seals	Silicone Grease	Protects rubber compression seals from drying and sticking.
Engine & Propulsion	Alternator adjustment slide	Marine Grease	Keeps adjustment slides moving freely during belt maintenance.
Engine & Propulsion	Alternator pivot bolt	Marine Grease	Protects the pivot from corrosion and makes future belt replacement easier.
Engine & Propulsion	Engine gear selector linkage	Marine Grease	Keeps external linkage moving freely while resisting water washout.
Engine & Propulsion	Engine hatch gas strut pivots	Marine Grease	Protects pivot joints while allowing smooth operation.
Engine & Propulsion	Engine hatch hinges	Marine Grease	Waterproof lubrication protects exposed hinges in damp engine spaces.
Engine & Propulsion	Engine mounting adjustment threads	Copper Anti-Seize	Helps prevent adjustment nuts seizing after years in a damp engine compartment.
Engine & Propulsion	Engine raw water pump impeller	Do Not Lubricate	Fit the impeller using the lubricant recommended by the manufacturer. Petroleum grease can damage the rubber and should not be used for routine lubrication.
Engine & Propulsion	Engine throttle linkage	Marine Grease	Lubricates exposed pivots and helps prevent corrosion.
Engine & Propulsion	Morse control cable end joints	Marine Grease	Helps protect exposed joints from corrosion while allowing free movement.
Engine & Propulsion	Morse control lever pivot	Marine Grease	Waterproof lubrication protects exposed pivots from corrosion and keeps controls operating smoothly.
Engine & Propulsion	Raw water pump cover O-ring	Silicone Grease	Protects the rubber seal without causing deterioration.
Engine & Propulsion	Raw water seacock spindle	Marine Grease	Waterproof grease helps prevent seacocks becoming stiff and difficult to operate.
Engine & Propulsion	Raw water strainer lid O-ring	Silicone Grease	Keeps rubber O-rings supple, improves sealing and helps prevent them sticking.
Engine & Propulsion	Raw water strainer threads (metal)	Marine Grease	A light coating helps protect exposed threads from corrosion and makes the strainer easier to remove during future maintenance.
Engine & Propulsion	Raw water strainer threads (plastic)	Do Not Lubricate	Plastic threads don’t normally require lubrication. Keep them clean and avoid overtightening, which can damage the threads or housing.
Fresh Water System	Fresh water pressure relief valve	Follow the manufacturer’s guidance	Internal valve designs vary and are usually maintenance-free.
Fresh Water System	Fresh water pump filter bowl O-ring	Silicone Grease	Keeps the O-ring supple, improves sealing and prevents it sticking to the housing.
Fresh Water System	Fresh water pump filter bowl threads (metal)	Marine Grease	A light coating helps prevent corrosion and makes the filter bowl easier to remove during future maintenance.
Fresh Water System	Fresh water pump filter bowl threads (nylon)	Do Not Lubricate	Nylon is naturally low-friction and doesn’t normally benefit from lubrication. Keep the threads clean and undamaged.
Fresh Water System	Fresh water pump filter bowl threads (plastic)	Do Not Lubricate	Plastic threads normally don’t require lubrication. Keep them clean and avoid overtightening, which can damage the threads.
Fresh Water System	Fresh water pump mounting screws	Copper Anti-Seize	Helps prevent stainless fasteners seizing during future maintenance.
Fresh Water System	Fresh water tap spindle	Silicone Grease	Suitable for potable water systems and protects internal seals during maintenance.
Fresh Water System	Mixer tap cartridge seals	Silicone Grease	Protects rubber seals without causing deterioration.
Fresh Water System	Shower hose washer	Silicone Grease	Helps prevent rubber washers sticking while maintaining a good seal.
Fresh Water System	Shower mixer valve seals	Silicone Grease	Helps prevent rubber seals drying out or sticking after long periods of inactivity.
Fresh Water System	Water tank filler cap O-ring	Silicone Grease	Prevents the rubber seal drying out while maintaining a watertight seal.
Fresh Water System	Water tank filler cap threads (metal)	Marine Grease	A light coating helps protect exposed threads from corrosion and makes the filler cap easier to remove after prolonged exposure to weather and salt.
Fresh Water System	Water tank filler cap threads (plastic)	Do Not Lubricate	Plastic threads don’t normally require lubrication. Keep them clean and avoid overtightening, which can damage the threads or filler cap.
Fresh Water System	Water tank inspection hatch seal	Silicone Grease	Keeps inspection hatch seals flexible and easier to remove for cleaning.
Hatches, Windows & Companionway	Cockpit locker gas strut pivots	Marine Grease	Protects pivot joints against corrosion.
Hatches, Windows & Companionway	Cockpit locker hinge	Marine Grease	Waterproof grease protects heavily exposed hinges.
Hatches, Windows & Companionway	Cockpit locker latch	Dry PTFE Spray	Keeps catches moving freely without collecting dirt.
Hatches, Windows & Companionway	Companionway lock	Dry PTFE Spray	Keeps lock cylinders operating smoothly without attracting dirt.
Hatches, Windows & Companionway	Companionway washboard runners	Dry PTFE Spray	Makes washboards easier to slide while remaining clean.
Hatches, Windows & Companionway	Deck hatch gas strut pivots	Marine Grease	Protects exposed pivots from corrosion while allowing smooth movement.
Hatches, Windows & Companionway	Deck hatch hinge	Marine Grease	Protects exposed hinge pins from corrosion while keeping the hatch operating smoothly.
Hatches, Windows & Companionway	Deck hatch hinge pin	Marine Grease	Waterproof lubrication reduces wear and makes future removal easier.
Hatches, Windows & Companionway	Deck hatch latch	Dry PTFE Spray	Keeps catches moving freely without attracting grit or dust.
Hatches, Windows & Companionway	Deck hatch locking mechanism	Dry PTFE Spray	Suitable for precision locking mechanisms that should remain clean.
Hatches, Windows & Companionway	Deck hatch rubber seal	Silicone Grease	Helps keep rubber seals supple and reduces the chance of sticking.
Hatches, Windows & Companionway	Portlight friction stay	Dry PTFE Spray	Helps friction mechanisms move smoothly without excessive grease build-up.
Hatches, Windows & Companionway	Portlight hinge	Marine Grease	Protects exposed hinges from corrosion.
Hatches, Windows & Companionway	Portlight latch	Dry PTFE Spray	Keeps small catches and latches operating freely.
Hatches, Windows & Companionway	Portlight rubber seal	Silicone Grease	Helps prevent rubber seals drying out while maintaining flexibility.
Hatches, Windows & Companionway	Sliding deck hatch runners	Dry PTFE Spray	Reduces friction without leaving a sticky residue that collects dirt.
Hatches, Windows & Companionway	Sliding hatch locking bolt	Dry PTFE Spray	Helps locking bolts move freely in exposed conditions.
Heads (Marine Toilet)	Holding tank inspection hatch seal	Silicone Grease	Protects rubber seals and makes future removal easier.
Heads (Marine Toilet)	Manual toilet pump piston	Silicone Grease	Protects piston seals while maintaining smooth pumping action.
Heads (Marine Toilet)	Manual toilet pump piston O-ring	Silicone Grease	Prevents the seal drying out and helps extend its service life.
Heads (Marine Toilet)	Toilet discharge seacock spindle	Marine Grease	Waterproof grease protects exposed spindle surfaces from corrosion.
Heads (Marine Toilet)	Toilet diverter valve spindle	Silicone Grease	Protects rubber sealing surfaces while allowing smooth valve operation.
Heads (Marine Toilet)	Toilet door lock	Dry PTFE Spray	Keeps locks operating smoothly without attracting dirt or salt crystals.
Heads (Marine Toilet)	Toilet hose connections	Do Not Lubricate	Hose tails rely on secure clamping to remain watertight. Tighten or replace the hose and clamps if necessary rather than applying lubricant.
Heads (Marine Toilet)	Toilet inlet seacock spindle	Marine Grease	Helps prevent seacocks becoming stiff and difficult to operate.
Heads (Marine Toilet)	Toilet joker valve	Do Not Lubricate	Joker valves are wear items that should be replaced if they become stiff, distorted or leak rather than lubricated.
Heads (Marine Toilet)	Toilet pump handle pivot	Marine Grease	Waterproof lubrication protects exposed pivots from corrosion.
Heads (Marine Toilet)	Toilet pump linkage	Marine Grease	Keeps external moving joints operating smoothly.
Heads (Marine Toilet)	Toilet pump shaft	Silicone Grease	Protects shaft seals during maintenance without damaging rubber components.
Heads (Marine Toilet)	Toilet seat hinges	Dry PTFE Spray	Helps plastic hinges move freely without leaving a greasy residue.
Interior & Accommodation	Cabin door hinges	Dry PTFE Spray	Clean lubrication is usually preferable for interior hinges.
Interior & Accommodation	Cabin door lock	Dry PTFE Spray	Suitable for lock mechanisms that need clean lubrication.
Interior & Accommodation	Cabin ventilation flap hinge	Dry PTFE Spray	Suitable for lightly loaded hinges inside the cabin.
Interior & Accommodation	Cupboard hinge	Dry PTFE Spray	Provides clean lubrication without attracting dust inside the cabin.
Interior & Accommodation	Door latch	Dry PTFE Spray	Keeps latches moving freely without attracting dirt.
Interior & Accommodation	Drawer runners	Dry PTFE Spray	Reduces friction without attracting dust and debris.
Interior & Accommodation	Folding table hinges	Dry PTFE Spray	Helps folding hinges move freely without attracting dust or leaving a greasy residue on cabin furniture.
Interior & Accommodation	Fridge door hinge	Dry PTFE Spray	Clean lubrication avoids grease contaminating food storage areas.
Interior & Accommodation	Fridge door latch	Dry PTFE Spray	Keeps catches operating smoothly.
Interior & Accommodation	Fridge door rubber seal	Silicone Grease	Helps maintain seal flexibility and reduces sticking.
Interior & Accommodation	Gimballed cooker locking pin	Marine Grease	Keeps removable locking pins easy to operate.
Interior & Accommodation	Gimballed cooker pivot	Marine Grease	Waterproof grease protects heavily loaded pivots from corrosion.
Interior & Accommodation	Instrument panel hinges	Dry PTFE Spray	Keeps access panels operating freely without attracting dust.
Interior & Accommodation	Instrument panel lock	Dry PTFE Spray	Suitable for precision lock mechanisms.
Interior & Accommodation	Locker hinge	Dry PTFE Spray	Helps hinges move freely while avoiding greasy residue.
Interior & Accommodation	Oven door hinges	Dry PTFE Spray	Helps hinges move freely while remaining clean.
Interior & Accommodation	Roller catches	Dry PTFE Spray	Helps spring-loaded catches operate consistently.
Interior & Accommodation	Sliding locker catches	Dry PTFE Spray	Keeps catches operating smoothly.
Interior & Accommodation	Table pedestal locking mechanism	Dry PTFE Spray	Helps locking mechanisms operate smoothly without becoming sticky.
Mast & Spars	Boom reefing sheave	Follow the manufacturer’s guidance	Many reefing sheaves are designed to operate without routine greasing.
Mast & Spars	Boom vang block bearings	Follow the manufacturer’s guidance	Block bearing designs vary considerably.
Mast & Spars	Boom vang pivot	Marine Grease	Protects exposed pivot pins while allowing smooth articulation.
Mast & Spars	Exit sheave	Follow the manufacturer’s guidance	Lubrication depends on the sheave design and bearing type.
Mast & Spars	Gas strut boom vang pivot	Marine Grease	Keeps pivot points operating freely while protecting exposed metal surfaces.
Mast & Spars	Gooseneck pivot	Marine Grease	Waterproof lubrication protects this heavily loaded pivot from corrosion and wear.
Mast & Spars	Gooseneck slide	Dry PTFE Spray	Reduces friction on sliding surfaces without attracting dirt.
Mast & Spars	Mainsail bolt rope track	Dry PTFE Spray	Reduces friction when hoisting or lowering sails.
Mast & Spars	Mast track sail slides	Dry PTFE Spray	Helps sail slides run more freely without leaving a sticky residue.
Mast & Spars	Masthead sheave	Follow the manufacturer’s guidance	Modern sheaves may use sealed bearings or composite bushes that should not be greased.
Mast & Spars	Pole mast car bearings	Follow the manufacturer’s guidance	Many mast cars use low-friction composite bearing materials.
Mast & Spars	Sailing winch bearings	Follow the manufacturer’s guidance	Bearing materials vary between manufacturers and some require only light lubrication.
Mast & Spars	Sailing winch gears	Marine Grease	Waterproof grease protects heavily loaded gear teeth from wear and corrosion.
Mast & Spars	Sailing winch pawls	Light Machine Oil	Winch pawls rely on free movement. Grease can make them stick and prevent proper engagement.
Mast & Spars	Sailing winch spindle	Marine Grease	A light coating protects the spindle from corrosion and supports smooth rotation.
Mast & Spars	Spinnaker pole jaw pivot	Marine Grease	Protects exposed pivot points from corrosion.
Mast & Spars	Spinnaker pole jaw trigger	Dry PTFE Spray	Keeps spring-loaded mechanisms moving freely without attracting grit.
Mast & Spars	Spinnaker pole piston	Dry PTFE Spray	Helps internal spring mechanisms move smoothly while remaining clean.
Outboard Motor	Outboard clamp screw swivel	Marine Grease	Lubricates heavily loaded pivots while resisting water washout.
Outboard Motor	Outboard clamp screw threads	Marine Grease	Helps prevent clamp screws seizing after prolonged exposure to salt water.
Outboard Motor	Outboard gear selector linkage	Marine Grease	Keeps exposed moving joints operating freely.
Outboard Motor	Outboard propeller retaining nut	Copper Anti-Seize	Helps prevent seizure and makes future propeller removal easier.
Outboard Motor	Outboard propeller shaft	Marine Grease	Apply a light coating before refitting the propeller to help prevent it seizing onto the shaft.
Outboard Motor	Outboard steering friction adjuster	Follow the manufacturer’s guidance	Adjustment mechanisms vary considerably between manufacturers.
Outboard Motor	Outboard steering tube	Marine Grease	One of the most common outboard maintenance points. Regular greasing helps prevent seizure.
Outboard Motor	Outboard throttle linkage	Marine Grease	Protects exposed linkage pivots from corrosion.
Outboard Motor	Outboard tilt pivot	Marine Grease	Protects tilt pivots from corrosion and keeps them operating freely.
Propeller	Feathering propeller grease points	Marine Grease	Most feathering propellers require periodic greasing as part of routine maintenance.
Propeller	Folding propeller blade pivots	Marine Grease	Waterproof grease protects heavily loaded pivots and reduces wear.
Propeller	Folding propeller grease nipples	Marine Grease	Use the grease specified by the propeller manufacturer.
Propeller	Propeller retaining nut	Copper Anti-Seize	Helps prevent seizure while allowing future removal.
Propeller	Propeller shaft taper	Do Not Lubricate	The shaft taper relies on a clean metal-to-metal fit to transmit drive securely. Keep both mating surfaces clean and dry during assembly.
Roller Furling	Furling line guide	Dry PTFE Spray	Helps reduce friction without attracting dirt that could interfere with furling.
Roller Furling	Furling line guide roller	PTFE Grease	Provides smooth operation while resisting dirt build-up.
Roller Furling	Furling system foil joints	Do Not Lubricate	Foil joints are structural connections and should be kept clean and correctly assembled rather than lubricated.
Roller Furling	Headsail furling drum bearings	Follow the manufacturer’s guidance	Many modern furling systems use sealed or self-lubricating bearings that should not be greased.
Roller Furling	Headsail furling drum spindle	Marine Grease	Protects exposed spindle surfaces from corrosion where recommended by the manufacturer.
Roller Furling	Headsail upper swivel	Follow the manufacturer’s guidance	Many upper swivels contain sealed bearings that require little or no routine lubrication.
Roller Furling	Headsail upper swivel shackle pin	Marine Grease	Protects exposed threads from corrosion and makes future removal easier.
Rudder System	Autopilot drive arm linkage	Marine Grease	Keeps external moving joints operating smoothly.
Rudder System	Autopilot ram pivots	Marine Grease	Lubricates exposed pivots while protecting them from corrosion.
Rudder System	Emergency tiller socket	Marine Grease	Protects the socket from corrosion so the emergency tiller can be fitted quickly if needed.
Rudder System	Rudder gland adjustment threads	Copper Anti-Seize	Keeps adjustment threads free and reduces the risk of seizure.
Rudder System	Rudder stock bearings	Follow the manufacturer’s guidance	Many modern rudder bearings are self-lubricating composite designs.
Rudder System	Rudder stock stuffing box	Marine Grease	Grease fittings, where fitted, help lubricate and seal traditional stuffing boxes.
Running Rigging	Ball-bearing sailing block	Follow the manufacturer’s guidance	Many modern ball-bearing blocks are designed to run dry or use specialist lubricants.
Running Rigging	Cam cleat cam	Dry PTFE Spray	Reduces friction without leaving a sticky residue that attracts grit.
Running Rigging	Cam cleat pivot	Dry PTFE Spray	Helps springs and pivots move freely while remaining clean.
Running Rigging	Deck organiser sheaves	Follow the manufacturer’s guidance	Some sheaves run on plain bushes while others use sealed bearings.
Running Rigging	Genoa car adjustment screw	Marine Grease	Keeps adjustment screws moving freely and protects threads from corrosion.
Running Rigging	Genoa car bearings	Follow the manufacturer’s guidance	Modern cars often use self-lubricating bearing materials.
Running Rigging	Jammer mechanism	Dry PTFE Spray	Keeps moving parts operating freely without attracting contaminants.
Running Rigging	Mainsheet traveller adjustment screw	Marine Grease	Protects exposed adjustment threads from corrosion and makes fine adjustment easier.
Running Rigging	Mainsheet traveller car bearings	Follow the manufacturer’s guidance	Many traveller cars use Torlon or Delrin bearings that should not be greased.
Running Rigging	Plain-bearing sailing block	Marine Grease	Waterproof grease protects plain bearings used in traditional blocks.
Running Rigging	Ratchet block mechanism	Follow the manufacturer’s guidance	Internal ratchet mechanisms vary considerably between manufacturers.
Running Rigging	Rope clutch cam	Dry PTFE Spray	Helps the cam pivot freely without attracting dirt that can affect rope grip.
Running Rigging	Rope clutch pivot	Dry PTFE Spray	Suitable for lightly loaded exposed pivots where clean lubrication is preferred.
Running Rigging	Self-tacking jib car bearings	Follow the manufacturer’s guidance	Lubrication depends on the bearing design used by the manufacturer.
Running Rigging	Snatch block hinge	Marine Grease	Protects exposed hinge pins from corrosion and keeps them operating freely.
Running Rigging	Swivel block swivel	PTFE Grease	Lubricates rotating joints without attracting excessive dirt.
Running Rigging	Turning block bearings	Follow the manufacturer’s guidance	Bearing design varies considerably between manufacturers.
Shaft Drive	Cutless bearing	Do Not Lubricate	Cutless bearings are designed to be lubricated by water while the shaft is turning. Grease can block water flow and shorten bearing life.
Shaft Drive	Flexible shaft coupling	Follow the manufacturer’s guidance	Flexible couplings often contain rubber elements that should not be greased.
Shaft Drive	Rope cutter pivot	Marine Grease	Lubricates exposed moving parts while protecting against corrosion.
Shaft Drive	Shaft anode fasteners	Copper Anti-Seize	Makes future anode replacement easier without affecting the anode itself.
Shaft Drive	Shaft coupling bolts	Copper Anti-Seize	Helps prevent stainless fasteners seizing during future maintenance.
Shaft Drive	Stuffing box adjustment threads	Copper Anti-Seize	Helps prevent adjustment nuts seizing together.
Shaft Drive	Traditional packed stern gland	Marine Grease	Grease, where specified, lubricates the packing while helping to reduce water ingress.
Standing Rigging	Baby stay adjuster threads	Marine Grease	Reduces corrosion and keeps adjustment threads operating freely.
Standing Rigging	Chainplate pin	Marine Grease	Protects exposed pins from corrosion and makes future inspection or removal easier.
Standing Rigging	Forestay furling toggle	Marine Grease	Protects exposed pivots from corrosion while allowing free articulation.
Standing Rigging	Hydraulic backstay adjuster pivots	Marine Grease	Lubricates exposed pivot points while protecting against corrosion.
Standing Rigging	Mast heel pivot pin (tabernacle masts)	Marine Grease	Waterproof lubrication protects heavily loaded pivot points during mast raising and lowering.
Standing Rigging	Mast tabernacle hinge	Marine Grease	Prevents corrosion and reduces wear on folding mast hinges.
Standing Rigging	Mechanical backstay adjuster threads	Marine Grease	Helps adjustment mechanisms operate smoothly and protects exposed threads.
Standing Rigging	Rigging screw (turnbuckle) threads	Follow the manufacturer’s guidance	Lubrication recommendations vary depending on the manufacturer and whether the rigging uses stainless steel, bronze or other materials.
Standing Rigging	Rigging screw body (external surfaces)	Marine Grease	A light coating protects exposed metal surfaces from corrosion and makes future adjustment easier.
Standing Rigging	Rigging toggle pin	Marine Grease	Helps prevent corrosion while allowing the toggle to articulate freely under load.
Standing Rigging	Standing rigging bottle screw locknuts	Copper Anti-Seize	Helps prevent stainless steel threads seizing after prolonged exposure.
Tiller Steering	Swan-neck fitting	Marine Grease	Protects exposed pivots from corrosion and wear.
Tiller Steering	Tiller extension locking mechanism	Dry PTFE Spray	Helps locking mechanisms operate smoothly without attracting grit.
Tiller Steering	Tiller extension universal joint	Follow the manufacturer’s guidance	Many flexible joints use rubber or engineered polymers that should not be greased.
Tiller Steering	Tiller pin	Marine Grease	Keeps removable tiller pins easy to fit and remove.
Tiller Steering	Tiller pivot	Marine Grease	Waterproof grease protects exposed pivot points from corrosion.
Wheel Steering	Steering cable	Do Not Lubricate	External lubrication can trap dirt and damage some cable systems. Inspect the cable regularly and follow the steering manufacturer’s maintenance guidance.
Wheel Steering	Steering cable sheaves	Follow the manufacturer’s guidance	Some sheaves use sealed bearings while others run on plain bushes.
Wheel Steering	Steering chain	Marine Grease	Protects exposed chain links from corrosion while reducing wear.
Wheel Steering	Steering pedestal bearings	Follow the manufacturer’s guidance	Bearing design varies between steering systems.
Wheel Steering	Steering shaft	Marine Grease	Protects exposed shaft surfaces from corrosion where appropriate.
Wheel Steering	Steering sprocket	Marine Grease	Helps reduce wear between chain and sprocket teeth.
Wheel Steering	Steering wheel brake	Dry PTFE Spray	Helps moving parts operate freely without attracting dirt.

Getting the Best Results from Any Lubricant

Choosing the right lubricant is only half the job. How you prepare the part and apply it often makes just as much difference.

Clean First, Lubricate Second

The best lubricant in the world won’t work properly if it’s applied over old, contaminated grease.

Over time, grease picks up dirt, salt, grit and tiny metal particles created through normal wear. Simply adding fresh grease on top traps that contamination where it can continue doing damage.

Before reaching for the grease, wipe away as much of the old lubricant as you can. If the part is particularly dirty, clean it properly before applying fresh grease. You’ll often find that a few extra minutes spent cleaning has more impact on the life of the part than the lubricant itself.

This is especially important on exposed fittings such as hinges, steering linkages and trailer fittings, where road dirt, salt and general grime can quickly build up.

Think of fresh grease as the final step in the job, not the first.

Removing Old Grease

Old grease often contains grit, dried salt and tiny metal particles, so simply applying fresh grease over the top is rarely a good idea.

Many boat owners use a small container of diesel or paraffin to soften and remove heavily caked grease from metal parts before cleaning them properly. It works well on dismantled parts such as winch components, steering linkages and seized fittings, but remember that whatever dissolves the grease now has to be disposed of responsibly afterwards. It’s also worth laying plenty of cardboard or absorbent pads underneath the job because the black sludge that comes off has an uncanny ability to end up everywhere except the container.

Protecting Your Hands

Grease is messy enough, but the solvents used to remove it can be even harder on your skin. Disposable nitrile gloves are useful for many maintenance jobs, but prolonged exposure to diesel, paraffin and some degreasers can eventually soften or damage them. If you’re tackling a long strip-down, expect to change gloves regularly rather than trying to make one pair last all afternoon.

Whatever you wear, wash your hands thoroughly afterwards and use a barrier or moisturising cream if you’re spending a lot of time doing maintenance. Your skin will thank you after a full day servicing winches or trailer bearings.

Have Plenty of Rags

You will always need more rags than you think.

Old cotton T-shirts, workshop wipes or paper roll disappear surprisingly quickly once grease starts coming apart. Keep one pile for wiping boat parts or fittings, another for your hands and tools, and resist the temptation to put clean parts back onto a greasy workbench. Staying organised isn’t just tidier; it also makes it much less likely you’ll contaminate freshly lubricated parts with old abrasive grease.

More Grease Isn’t Better Grease

A common mistake is assuming that if a little grease is good, a lot must be even better.

In reality, the opposite is often true.

Grease has two main jobs: to reduce friction between moving parts and to protect them from water and corrosion. Once the surfaces have a light, even coating, more grease rarely provides extra protection.

Instead, excess grease tends to collect dirt, dust, sand and salt crystals. Over time, that contamination mixes with the grease to form an abrasive paste that can increase wear rather than reduce it. It also makes maintenance messier and can hide problems such as loose fasteners, worn bushes or leaking seals during routine inspections.

A thin, even coating is usually all that’s required. Apply enough to protect the part or fitting, wipe away any excess and let the lubricant do its job.

Sometimes the Best Lubricant Isn’t Grease

A common maintenance mistake isn’t choosing the wrong grease.

It’s assuming that every moving part needs lubricating in the first place.

Many parts and fittings on a modern boat are designed to work without grease. Cutless bearings, for example, are lubricated by water. Windlass clutch cones rely on friction to grip properly, while many bearings are sealed for life and should simply be replaced when they eventually wear out.

Other parts do need lubrication, but not with grease. Winch pawls usually require a light machine oil so they can move freely, rubber seals are better protected with silicone grease, and electrical connections benefit from dielectric grease to help keep moisture and corrosion at bay.

The important lesson is that lubrication isn’t about applying grease to everything that moves. It’s about understanding how each component is designed to work and choosing the product—or sometimes no product at all—that supports that design.

That’s one of the reasons the lookup includes so many Do Not Lubricate recommendations. They’re not omissions; they’re there because applying grease in the wrong place can shorten the life of a part just as easily as neglecting it altogether.

Spend More When It Genuinely Buys You Something

It’s easy to assume that paying more automatically produces a better result.

In reality, choosing the right product is usually far more important than choosing the most expensive one.

For most boat owners, a good-quality waterproof marine grease from a reputable manufacturer will handle the vast majority of routine maintenance jobs perfectly well. Premium products can offer genuine advantages, but only if your maintenance jobs actually demand them. Better water resistance, higher load capacity and greater temperature tolerance all have their place—but many recreational boats will never ask that much of a grease.

The same applies to specialist lubricants. You don’t need to buy them all on your first trip to the chandlery. Start with a good marine grease, then add products such as silicone grease, dielectric grease or copper anti-seize as particular maintenance jobs arise.

The lookup table also helps you get more value from the products you already own. If you’ve bought silicone grease to service a water pump filter O-ring, you’ll probably discover hatch seals, inspection covers and other rubber fittings that benefit from the same product. The same applies to dielectric grease, anti-seize and the other specialist lubricants covered in this guide.

Over time, you’ll build a small collection of lubricants that suits both your boat and the way you maintain it. Rather than filling a shelf with products you rarely use, you’ll gradually assemble a practical toolkit that covers almost every routine maintenance job onboard.

Our Recommended Lubricants

Now that you know which type of lubricant you need, let’s look at the products we’d actually buy.

Best Overall Marine Grease

Lucas Oil 10320 Marine Grease

Buyer Sentiment Score: 94 / 100
Value For Money Score: 90 / 100
Marine Suitability: Excellent

Lucas Marine Grease is our Best Overall because it gets the fundamentals right without trying to be a specialist product for one particular job.

The strongest pattern in the evidence is its consistency. It stays where it is applied, resists water washout and is repeatedly used on trailer bearings, steering components, boat lifts and heavily loaded pivots. Those are exactly the sorts of jobs where a marine grease needs to cope with water, load and long periods between services.

That broad usefulness is one of its advantages. The same grease is used on boats, trailers and other outdoor equipment, so you are not buying something that only makes sense for one narrow marine application.

It is also a good fit for the way most recreational boat owners actually maintain their boats. A cartridge lasts a long time for occasional maintenance, and the price is reasonable enough that there is little incentive to stretch an old, contaminated charge of grease beyond its useful life.

There are some minor criticisms. A small number of owners report that the cartridge can be a tight fit in some grease guns, and Lucas is still grease rather than a substitute for proper servicing. Bearings and other components exposed to repeated immersion or heavy use still need inspection and fresh lubricant at appropriate intervals.

Those points don’t change the overall judgement. Lucas is a dependable, versatile marine grease that covers a large proportion of routine boat maintenance without making the owner pay for specialist characteristics they may never need.

For most boat owners, that makes it the sensible starting point.

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Best Choice if You Maintain More Than Just a Boat

TRIAX Atlas 600 Marine Grease

Buyer Sentiment Score: 95 / 100
Value For Money Score: 85 / 100
Marine Suitability: Excellent

TRIAX Atlas 600 is not the grease we’d choose simply because you own a boat. Its real advantage is that it is capable enough to become the one grease you keep for the boat, trailer and other heavy-duty equipment as well.

That versatility is what separates it from Lucas in this guide. Atlas 600 is used on boat trailers, farm machinery, tow vehicles and other equipment where high loads, shock loading, water exposure and outdoor conditions are part of normal use. Buyers particularly value its ability to stay where it is applied and resist water washout.

That makes it attractive if your maintenance cupboard already covers more than one machine. Instead of keeping one grease for the boat and another for the trailer or workshop equipment, Atlas 600 can cover a much wider range of demanding applications.

There is a trade-off: you pay more for that versatility. The current evidence includes buyers who are very happy with its performance but also recognise that its capabilities are unnecessary for light-duty or occasional boat maintenance.

For someone who only greases a few fittings on a sailing boat once or twice a year, Lucas remains the more sensible choice. But if you maintain a boat, trailer, tow vehicle, agricultural or workshop equipment, the extra capability becomes much easier to justify.

The manufacturer’s current specification also reflects that heavy-duty positioning: Atlas 600 is an NLGI-2 synthetic calcium-sulfonate-complex grease intended for high loads, water exposure and severe multi-purpose service, with GC-LB classification.

In other words, Atlas 600 isn’t necessarily a better boat grease than Lucas. It’s a better choice for the owner who wants one capable grease to cover a much wider range of machinery.

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Best PTFE Grease

Super Lube Multi-Purpose Synthetic Grease with PTFE

Buyer Sentiment Score: 93 / 100
Value For Money Score: 89 / 100
Marine Suitability: Very Good

Super Lube earns its place here because it is a PTFE grease that is particularly good at jobs where smooth, low-friction movement matters more than maximum water resistance or load carrying.

It isn’t primarily a marine product, and that is actually part of its appeal. Owners use it on an unusually wide range of equipment, from precision mechanisms and workshop equipment to boats, trailers and outdoor machinery. That breadth of use is consistent with the role it plays: a clean, stable grease for parts that need to move freely rather than simply survive heavy water exposure.

Boat owners report using it on turnbuckles, stainless rigging parts, marine fittings, trailer bearings and outboard components. The fact that it is white and virtually odourless is also useful during maintenance; it doesn’t leave the black, messy coating associated with some conventional greases.

There is a limit, though. Super Lube is not a substitute for a good waterproof marine grease on every boat component. Where a bearing or fitting has to cope with heavy loads and repeated water exposure, Lucas or another purpose-made marine grease remains the more natural choice.

The other lesson is to use it sparingly. Owners and experienced users regularly point out that applying too much can create unnecessary drag or attract dirt, particularly on exposed mechanisms. A thin film is normally enough.

So the distinction is quite simple:

Use Super Lube when smooth, clean and low-friction operation is the priority. Use a conventional marine grease when water resistance, load carrying and protection are the bigger concerns.

For many boats, there is room for both in the toolbox.

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Best Silicone Grease

Prounol Silicone Grease

Buyer Sentiment Score: 91 / 100
Value For Money Score: 90 / 100
Marine Suitability: Excellent

Prounol is the specialist grease in this guide for jobs involving rubber seals, O-rings, plastics and water-system fittings.

That is a different role from the waterproof marine greases elsewhere in the guide. You are not choosing Prounol because it is the toughest grease for a heavily loaded bearing. You are choosing it because silicone grease is particularly well suited to keeping seals supple, reducing friction and helping prevent rubber components from sticking or deteriorating.

The range of applications reported by owners is unusually broad. Prounol is used on taps, shower seals, caravan toilet seals, dive equipment, fishing tackle, camera O-rings and automotive door rubbers. Although those jobs have little else in common, they all involve the sort of rubber or plastic components for which silicone grease is useful.

That makes it particularly useful aboard a boat. Hatch and locker seals, pump O-rings, plumbing fittings and other rubber components are all jobs where a small amount of silicone grease can make maintenance easier and help prevent sticking.

The owner feedback is also reassuringly consistent about how little is needed. A thin smear is normally enough, and using too much can simply give dirt something to stick to. The product’s current instructions make the same point: apply a very thin layer and remove excess.

There is an important limit, however. Silicone grease can preserve a sound seal; it cannot repair one that is already cracked, hardened or permanently compressed. The existing owner feedback makes that distinction particularly well.

The product is also sold for food- and drinking-water-related applications, which makes the formulation attractive for some onboard plumbing work. If using it where potable-water approval is a requirement, however, check the certification of the specific product and size you are buying rather than assuming that every silicone grease is automatically suitable. Prounol’s current product information describes its general silicone grease as suitable for rubber, plastic and metal components and gives a -50°C to +200°C operating range.

For most boat owners, a small tub will last a very long time. It isn’t the grease you will use everywhere, but when the job is protecting a seal or lubricating a water-system component, it is the right sort of product for the job.

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Best Dielectric Grease

Permatex Dielectric Tune-Up Grease

Buyer Sentiment Score: 90 / 100
Value For Money Score: 91 / 100
Marine Suitability: Excellent

Permatex is the dielectric grease we recommend for protecting electrical connections from moisture, salt and corrosion. We also recommended it in our guide to boat corrosion protection products, and it remains a good fit for the same preventative-maintenance job here.

The important thing to understand is that dielectric grease is an insulator, not a conductive grease. Its purpose is not to make the electrical connection conduct better. It helps keep water, salt and oxygen away from the connection, reducing the conditions that cause corrosion.

That can sound counter-intuitive. If the grease doesn’t conduct electricity, why put it on an electrical connection?

The answer is that a properly assembled connection still makes its electrical contact through the metal surfaces. The grease is displaced where the terminals meet, while the remaining film helps protect the connection around and beyond the contact area.

That makes Permatex particularly useful for the sort of preventative maintenance that pays off on a boat. It can be used on battery terminals, trailer sockets, outdoor lighting, outboards and other electrical connections exposed to damp and salt. The owner experience is especially positive when it is used routinely rather than waiting until corrosion has already become a problem.

It can also make future maintenance easier. Connections protected from moisture and corrosion are less likely to seize together, so terminals and connectors are more likely to come apart cleanly when they eventually need servicing.

There is an important qualification: dielectric grease will not turn a poor electrical connection into a good one. Clean, sound terminals still need to make proper metal-to-metal contact. A loose, badly corroded or damaged connector needs repairing or replacing rather than simply covering it in grease.

Use only a small amount. The owner feedback includes some initial surprise at how small the tube is, but that makes sense once you realise how little is required. Applying too much is not only wasteful; it can also create problems around delicate contacts.

For a boat owner, Permatex is therefore best thought of as a preventative electrical-protection product, not a general lubricant.

Clean the connection, make sure the metal contact is sound, apply a thin protective film and assemble it properly. The grease protects the connection; it doesn’t make the connection.

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Best Copper Anti-Seize Compound

BTAS Copper Anti-Seize Grease

Buyer Sentiment Score: 92 / 100
Value For Money Score: 94 / 100
Marine Suitability: Excellent

Most people don’t get particularly excited about copper anti-seize when they apply it.

They appreciate it much later, when a bolt that has been exposed to heat, corrosion and years of weather actually comes apart without a fight.

That is the real reason BTAS earns a place in this guide. It isn’t a general-purpose grease and shouldn’t be treated as one. Its job is to help prevent threaded fasteners binding together, making future dismantling easier.

The owner experience is particularly strong around jobs such as spark plugs, exhaust manifold bolts, wheel nuts, brake hardware and engine fasteners. The common theme is simple: apply a small amount when assembling the fastener, then benefit when it eventually has to come apart.

That makes it particularly useful aboard a boat. Engine mounts, exhaust fasteners, trailer hardware and other threaded components may sit untouched for years. A little anti-seize during assembly can make the eventual maintenance job considerably easier.

It also lasts a long time because you need very little. A thin coating on the threads is normally enough, so even a small tube can cover a surprising number of fasteners.

The downside is familiar to anyone who has used copper compound: it is messy. It stains, gets onto hands and tools easily, and isn’t something you want spread around the boat unnecessarily. More importantly, it shouldn’t become the answer to every lubrication problem. It belongs on appropriate threaded fasteners and selected heavy-duty applications, not on bearings, pivots or ordinary friction surfaces.

So while BTAS isn’t the grease you’ll reach for most often, it is one of those inexpensive products that is worth keeping on the boat. You may not use it for months or even years, but when you finally need to dismantle a stubborn fastener, you’ll be glad it is there.

If a threaded component may need to come apart years from now, a thin smear of anti-seize during assembly can be a very worthwhile few seconds of maintenance.

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Best PTFE Spray

Holt Pro-Lube PTFE Spray

Buyer Sentiment Score: 91 / 100
Value For Money Score: 92 / 100
Marine Suitability: Very Good

Dry PTFE spray is useful when a mechanism needs lubrication but you don’t want to leave a thick, sticky layer of grease behind.

That makes it quite different from the PTFE grease covered earlier. Both use PTFE to reduce friction, but the spray leaves a much thinner coating once the carrier has evaporated. It is therefore particularly useful on small mechanisms, sliding surfaces and moving parts where conventional grease would attract dirt or make the mechanism feel sluggish.

Owners use it on locks, catches, sliding tracks, hinges and other mechanisms where a clean, low-friction coating is preferable to a heavy grease. It is also useful where access is awkward and spraying is easier than working grease into a small mechanism.

The main advantage is therefore clean lubrication rather than maximum protection. A dry PTFE coating doesn’t provide the same sort of heavy water-resistant barrier as a marine grease, so it isn’t the product to choose simply because a component is exposed to seawater or carries a substantial load.

That distinction matters on a boat. A lock, catch or sliding mechanism may benefit from a dry coating because grease would collect dirt and grit. A heavily loaded bearing or exposed steering component has very different requirements and is better served by an appropriate grease.

As with any aerosol lubricant, application needs a little restraint. The aim is to coat the moving surfaces rather than soak the surrounding area. Overspray can also end up where you don’t want a slippery coating.

For boat owners, dry PTFE spray is therefore a useful specialist addition rather than a replacement for marine grease or PTFE grease.

If the mechanism needs to move freely but you don’t want it covered in grease, this is the PTFE product to reach for.

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Best Light Machine Oil

3-IN-ONE Multi-Purpose Drip Oil Flexican

Buyer Sentiment Score: 91 / 100
Value For Money Score: 88 / 100
Marine Suitability: Good (Sheltered Use)

Sometimes grease is simply too thick.

Small spring-loaded mechanisms and lightly loaded moving parts often need to move freely, and a heavy grease can restrict that movement or attract dirt. That’s where a light machine oil makes more sense.

3-IN-ONE is a particularly useful option because it is simple to apply and has a long-established reputation for dealing with exactly these sorts of small maintenance jobs. Owners use it on locks, hinges, catches, small fans and other mechanisms that have become stiff, noisy or reluctant to move.

The Flexican applicator is a useful feature on a boat. You can put a drop exactly where it is needed rather than spraying lubricant over the surrounding area, which is especially helpful when working on small mechanisms or fittings in the cabin. A little goes a long way, so a bottle can last for years.

Winch pawls are another important application for light machine oil. These small moving parts need to move freely, which is why manufacturers commonly specify oil rather than grease. Always follow the lubrication instructions for the particular winch rather than assuming that every winch component should be oiled.

There are limits, though. Despite the “multi-purpose” name, this isn’t a replacement for waterproof marine grease on bearings, heavily loaded pivots or fittings exposed to repeated seawater immersion. It is also better suited to sheltered applications because oil will eventually wash away when exposed to the elements.

For boat owners, we’d keep 3-IN-ONE for cabin locks, hinges, catches, small fans, winch pawls and the many little mechanisms that crop up during routine maintenance. Used sparingly and in the right places, it is a simple and inexpensive lubricant that solves problems which grease is often too heavy for.

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How We Chose These Lubricants

Every product in this guide has been selected using the same criteria we use across Budget Boat Bits: what the product is designed to do, how well it suits real boat maintenance, what buyers think of it and whether the price is justified.

We don’t assume that the most expensive product is automatically the best choice. A specialist lubricant may be excellent at one particular job but unnecessary for most boats, while a simple, inexpensive product can be the better buy when it does exactly what you need.

We’ve also looked at the practical side of ownership. A lubricant needs to be suitable for the conditions it will actually face, but it also needs to be easy to apply, available to UK boat owners and appropriate for the particular component being maintained.

Read more about how we research, score and recommend products.

Lubrication is only one part of keeping a boat in good condition. If you’re building a regular maintenance routine, our Boat Maintenance Hub brings together practical guides covering cleaning, corrosion prevention, batteries, engines, plumbing, electrical systems and other jobs that help keep your boat reliable throughout the season.

Summary

Choosing a boat lubricant isn’t simply a matter of finding the grease with the best specification. The right product depends on what the component needs to do.

A good waterproof marine grease will cover most routine lubrication jobs, which is why it should be the first lubricant most boat owners buy. Beyond that, the specialist products in this guide each have a more specific purpose.

Silicone grease is useful for protecting rubber seals and O-rings. Dielectric grease helps protect electrical connections from moisture and corrosion. Copper anti-seize is for threaded fasteners and other joints that may need to come apart years later. Dry PTFE spray suits sliding parts where you want low friction without leaving a sticky coating, while light machine oil is better for small mechanisms where grease would be too heavy.

Just as importantly, some components shouldn’t be lubricated at all. The aim is not to accumulate a shelf full of different products. It’s to understand what each lubricant is for, use it where it makes sense and leave it alone where the component is designed to operate without lubrication.

Good maintenance also means preparing the job properly, removing contaminated old grease, applying no more lubricant than necessary and following the manufacturer’s instructions for individual components. Get those basics right and even a fairly small collection of lubricants can cover most of the routine maintenance jobs you’ll encounter onboard.