Penetrating Oil / Water Displacer / DW-40 - 4Boats

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Size

20L

25L

£29.10 £26.89 Save £2.21

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DW-40 Penetrating Oil & Water Displacer

Name: Penetrating Oil / Water Displacer / DW-40
Price: 26.89 GBP
Rating: 5.0 (1 reviews)

Professional Grade Marine & Automotive Maintenance

DW-40 is a high-performance, solvent-based penetrating oil specifically engineered to tackle the harshest marine and industrial environments. This multi-action formula works by rapidly migrating into tight threads and crevices to break the bonds of rust and corrosion, while simultaneously displacing moisture to prevent electrical shorts and further oxidation.

RELIABILITY: Formulated to provide a thin, non-drying lubricating film that remains active even in high-humidity coastal environments.

Key Features

✔ Superior Penetration: Frees seized bolts, nuts, and mechanisms.
✔ Water Displacement: Removes moisture from ignition systems and electronics.
✔ Rust Prevention: Leaves a protective anti-corrosive barrier.
✔ Cleaning Action: Dissolves grease, grime, and adhesive residues.

Technical Specs

Base Type:	Mineral Oil / Hydrocarbon
Appearance:	Light Amber Liquid
Specific Gravity:	~0.779 g/ml
Flash Point:	~40°C (Closed Cup)
Solubility:	Insoluble in Water

Compatibility / Fitment Guide

Application	Recommended Use	Notes
Marine Engines	Outboards, Stern Drives	Protects against saltwater salt-crystal buildup.
Electrical	Terminals, Spark Plugs	Displaces moisture to prevent short circuits.
Hardware	Hinges, Locks, Cables	Lubricates and frees seized mechanisms.
Trailer Gear	Wheel Hubs, Winches	Critical for trailers exposed to marine conditions.

OEM Cross Reference

WD-40	Multi-Use Product / Specialist Penetrant
CRC	6-56 Marine / Power Lube
Silverhook	DW-40 Lubricant
Westway Oils	DW-40 Penetrating Fluid

Questions & Answers

Is this a genuine original part?

This is a premium quality aftermarket DW-40 formulation, manufactured to match the performance and water-displacement characteristics of industry-standard multi-purpose lubricants.

How do I know if it is compatible?

DW-40 is safe for use on most metals, plastics, and rubbers. It is a universal maintenance product used across marine, automotive, and household applications.

Can this be used on boat electronics?

Yes, it is specifically designed to displace moisture from electrical contacts, battery terminals, and ignition components to prevent corrosion and ensure reliable starting in damp conditions.

Note: Ensure surfaces are clean for maximum penetration. Always test on a small inconspicuous area when using on sensitive plastics or vintage finishes.

For the products under £150 the shipping is £6.99.

Free delivery for most items over £150.

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Penetrating Oil / Water Displacer / DW-40