1 COMPOUND, CONTAINING TETRAFLUOROETHYLENE FOR SEALING THREADS ON BRASS, BLACK IRON, GALVANIZED, STAINLESS STEEL, ALUMINUM, STEEL ALLOY AND PVC PLASTIC MATERIALS WHICH TRANSPORT AIR, STEAM, WATER, FUELS, GASES, ACIDS, ALKALINES, SOLVENTS, PETROLEUM OILS, KEROSENE AND AMMONIA