WD-40® Specialist® rust remover soak safely and effectively removes rust without acids or caustic chemicals. The formula has no toxic fumes, contains no VOCs, is non-irritating to skin and works without harming surrounding surfaces like rubber, plastic and paint. Use it to restore even intricate, hard to reach surfaces to clean, bare metal that is ready to paint. This product is ready to use and requires no dilution. Simply submerge your rusted item in the solution for at least 30 minutes to remove light rust, overnight (8 hours) for medium rust and up to 24 hr for heavily rusted items. Rust Remover Soak is ideal for use on auto restoration, tractors, antiques, farm equipment & implements, trailers & hitches and rusty tools. Quickly dissolve rust & restore tools - return tools and equipment to bare metal without chipping, scraping or scrubbing. One product with many uses- try rust remover soak for auto restoration, tractors, antiques, farm equipment, rusty tools and more. Multiple surfaces - use to restore metal, cast iron, chrome parts and more without harming paint, gaskets, trim or surrounding parts. Versatile applications - industrial-strength solution for any situation where corrosion and rust are concerns, such as nuts, bolts, blades and more. 1 gal size - larger size is ideal for heavy jobs that require soaking to remove rust.