Extra heavy, full density tape especially for gas lines. Recommended leak-proof sealant for lines carrying natural gas, propane, butane, water, oil and chemical installations. Use on plastic, stainless steel, aluminum and all metals, and carbon pipe, conduit, valves, bolts, almost anything with a thread. Permits easy disassembly. Pressure rating of 10,000 psi Meets Federal Specification T-27730A.