Description
WD-40 Multi-Use Product is the classic light amber spray for lubricating, protecting, penetrating and displacing moisture on metal parts and fittings around the home, workshop or vehicle. One product covers several jobs: freeing a seized bolt, quieting a squeaky hinge, stopping surface rust forming on tools, or clearing water out of an electrical connector after it’s been rained on.
The formula is tested against recognised standards rather than just marketed on the claim — it’s rated for lubrication and protection to ASTM D4172, extreme pressure lubrication to ASTM D3233, and corrosion protection under salt spray testing to ASTM B-117, which is a demanding accelerated-corrosion test.
Technical Specifications
| Product type | Multi-use penetrating and lubricating spray |
|---|---|
| Appearance | Light amber, cloudy liquid |
| Odour | Characteristic (petroleum-based) |
| Solubility in water | Insoluble |
| Kinematic viscosity | 2.8 cSt |
| Boiling point (initial) | 183°C |
| Freeze / pour point | Below -63°C |
| Lubrication rating | ASTM D4172 — lubricates and protects |
| Extreme pressure lubrication | ASTM D3233 — 1,200 lbs load rating |
| Corrosion protection | ASTM B-117 salt spray, 0-20% rusting in 72 hours |
| Pack size | 57g aerosol can |
Where to Use
- Hinges, wheels, rollers, chains and gears needing lubrication
- Tools and sporting equipment needing rust and corrosion protection
- Seized or corroded nuts, bolts, valves and locks
- Removing adhesive residue, light corrosion and some paint
- Water-affected electrical fittings and equipment, to displace moisture
How to Apply
- Shake the can — before use, to ensure the formula is properly mixed.
- Apply a light, even spray — direct at the hinge, fitting or affected area from a short distance.
- Allow it to work — for penetrating stuck fittings, give it a few minutes before attempting to move the part.
- Wipe away excess — on surfaces where a residue isn’t wanted, wipe off any excess after use.
The formula’s low viscosity is part of what makes it a genuine penetrant rather than just a surface lubricant. At 2.8 cSt it is thin enough to work into a tight, corroded thread that a heavier oil would sit on top of rather than penetrate. The extreme pressure lubrication rating of 1,200 lbs under ASTM D3233 also points to genuine load-bearing lubrication, not just a light surface film.
Important Notes
- Aerosol formulation — use in a well-ventilated area and avoid inhaling spray mist.
- Not water-soluble; clean spills with an appropriate degreasing method rather than water alone.
- Keep away from open flame or ignition sources, as with any aerosol lubricant.
