Purpose and Specifications

WD-40 Specialist Penetrant 400ml is your go-to spray for busting through rust, corrosion, grease, and grime on stuck nuts, bolts, threads, locks, chains, and seized parts. This premium formula penetrates 50% faster than competitors using capillary action to creep into tight crevices, dissolving rust bonds on contact while leaving a tough, water-resistant protective layer that stops future corrosion.

Key practical perks include safe use on metal, rubber, plastics, and most paints without damage. It works reliably in temperatures from -20°C to +90°C, perfect for garages, farms, or outdoor jobs in any weather. The smart straw flips up for precision spraying or down for wide coverage, and the 360° valve lets you spray upside down. Shelf life: 24 months unopened for long-term storage.

• 400ml aerosol can for plenty of applications
• Low odor, fast-acting, non-evaporating lubrication reduces friction
• Provides 3x better surface rust protection for longer part life

When to Use / Replace?

Spray it on rusted fixtures that won't budge after sitting for months or years in harsh conditions, like trailer hitches, bike chains, or engine bolts. Use before disassembly to avoid breaking parts. Reapply every 6-12 months on high-wear spots like door hinges or tools exposed to moisture for ongoing protection. Replace the can when empty; no expiration worries within 24 months.

FAQ

Q: Can I use it on my car's rusty brake caliper bolts?
A: Yes, it quickly loosens seized automotive fixings safely on metal and rubber parts, even in damp conditions.

Q: Does it work in cold winters?
A: Absolutely, effective from -20°C to +90°C, so it penetrates and lubricates in freezing temps without gumming up.

Q: How long does the protection last?
A: The non-evaporating layer guards against rust for months, outperforming basic sprays for fewer repeat jobs.