Easy to Use: Apply gel to a rusted surface. Allow to penetrate for 15 minutes. Simply rinse with water. Gel won’t run. (To remove heavy rust, allow the gel to penetrate the surface for 1 to 2 hours before rinsing). Once rust is removed, Bull Frog metal-seeking VpCIs go to work sealing and protecting the metal, with a self repairing ‘Molecular Umbrella’, from the air and moisture that cause further rust and corrosion. Developed and used by Major Industries, the Military & NATO.