Evapo-rust is an environmentally safe, water based product specially designed to remove rust in minutes without any tiresome scrubbing. Contains no fumes, bad odors or VOCs as well as is non-toxic and non-corrosive ensuring it is safe on skin. The biodegradable water soluble formula can easily be disposed of in the sewer and will not affect plastic, PVC, Viton and most paints. To use, simply immerse the rusty object in the solution, leaving for 10 minutes for light rust or up to overnight for extremely heavy rust. Proudly made in the USA.