Chemicals & Fluids › Copper Spray-A-Gasket Image 1 of 1 Copper Spray-A-Gasket $22.95 Fast drying, metallic copper sealant helps dissipate heat, prevents gasket burnout, and improves heat transferFills minor surface irregularities, seals instantlyTemperature range –50° F to 500° F, resists all types of automotive fluids, especially gasoline Quantity: Purchase Added! Fast drying, metallic copper sealant helps dissipate heat, prevents gasket burnout, and improves heat transferFills minor surface irregularities, seals instantlyTemperature range –50° F to 500° F, resists all types of automotive fluids, especially gasoline