Thread SealerPTFE based with rust and corrosion inhibitors. Effective range: -30 degree to 550 degree F. Sealant range: 10,000 psi (pressure). Application: delivers a flexible leak-proof seal in aluminum, steel, stainless steel and plastic against coolants, water, gasoline, natural gas and LPG. Designed for use with bolts. (1.69 fl. oz.)