Rust-Off is a heavy-duty rust converter. Simply spray or brush it on any metal surface to neutralize existing rust and leave you with a hard, durable barrier that seals out moisture and prevents further rust. Rust-Off dries as hard as the metal to which it adheres. It's ideal for truck beds, dumpsters, bridge beams, equipment, tools, and any other metal surface. You can also easily paint over it in any color.