WD-40 300004 Specialist Rust Release Penetrant Spray 11 oz

The WD-40 Specialist 300004 Rust Release Penetrant Spray is a professional-grade, fast-acting penetrating lubricant engineered to free rusted, seized, and stuck parts quickly and effectively. Sold as a convenient 11 oz aerosol can, this product is an ideal choice for shops, maintenance crews, and heavy users who need reliable rust-fighting performance on hand at all times.

Powered by proprietary Blu Torch™ Technology — a specialized blend of synthetic additives — this penetrant uses capillary action to drive deep into crevices, threads, and seams, breaking the rust bonds that lock stuck parts together. It penetrates at least 50% faster than leading competitors, minimizing downtime and getting equipment back in service faster.

Key Features:

• Proprietary Blu Torch™ Technology drives penetrant deep into rusted threads, seams, and crevices
• Frees seized nuts, bolts, threads, locks, chains, and other stuck fasteners
• Leaves behind a protective lubricating layer to help prevent rust and corrosion from re-forming
• Low-odor, professional-grade formula — strong performance without harsh, lingering scents
• Safe for use on metal, rubber, and plastic surfaces
• Features a permanently attached Smart Straw® Sprays 2 Ways® for pinpoint precision or broad coverage
• 50-state VOC compliant — meets regulations in all US states including California
• Packaged as an 11 oz aerosol can (MPN: 300004)

Whether tackling rusted pipe fittings, seized engine fasteners, corroded locks, or frozen chain links, WD-40 Specialist Penetrant delivers industrial-strength results. The integrated Smart Straw applicator allows users to switch between a wide spray pattern for large areas and a narrow stream for targeted application — no separate straw to lose.