A product of extensive research, EVAPO-RUST® rust remover is a water-based product that removes rust to bare metal, without scrubbing or sanding. It is easy to use, so anyone can restore their rusted tools, auto parts, hardware, cookware, and even firearms to like-new condition. Since Evapo-Rust® Super Safe Rust Remover is reusable, one gallon will remove 1/2 lb of dry rust.