Rust-Oleum Automotive 2-In-1 Rust Reform and Seal is a specialty rubberized paint designed to provide a protective barrier against corrosion and rust on cars, trucks, RVs and more. Dual purpose coating seals rusted, primed and bare metal in a chemical and abrasion resistant finish. Advanced 2-in-1 formula is perfect for fixing current rust issues as well as preventing any future damage to the vehicle underbody and wheel wells.