Fast-drying, metallic copper sealant helps dissipate heat, prevents gasket burnout and improves heat transfer. Fills minor surface irregularities. Seals instantly. Fills hot spots and surface imperfections. Temperature range -50 Deg. F to 500 Deg. F (-45 Deg. C to 260 Deg. C); resists all types of automotive fluids, especially gasoline. Level 3 Product Features:Fast-drying, metallic copper spray adhesive sealant Helps to dissipate heat, prevents gasket burnout, and improves heat transferFills minor surface irregularities, fills hot spots and surface imperfectionsResists all types of automotive fluids, especially gasolineTemperature Range: -50 Deg. F to 500 Deg. F (-45 Deg. C to 260 Deg. C)