Hi-Gear RUST STOP PRIMER, SANDABLE, RED, QUICK-DRYING, FOR ALL TYPES OF PAINTS. Corrosion inhibitors prevent rusting, suppress oxidation and aging processes on the painted surfaces. It can be used as a pore-filler with a putty knife. It takes 5 minutes to get the fully dry one layer. The recommended number of layers is 2 - 3. The time of complete drying is 6 hours.