Destroys rust on contact. Bonds and transforms rust into a sandable and paintable surface. Sprays on clear and transforms into a black, metal protecting coating. Prevents future rust from forming. Saves you the time of sanding all the way down to bare metal. Can be used with body filler and fiberglass. Sands to a smooth finish for top coating. Dry to touch in 30 minutes, handle in 1 hour.