Rust Away is the safe and effective way to remove rust from metal without scrubbing. Will not harm surfaces including rubber, plastic, vinyl, PVC, aluminum, copper, and brass. The pH neutral formula is non-toxic, biodegradable, and non-flammable. Simply clean rusty items to remove dirt and oils before submerging object in the liquid. Rust severity will determine soak time which can range from hours to overnight for stubborn deposits.