Thread Sealant, Loctite 55 thread has been developed to replace the pastes, hemps and tapes normally used. It instantly seals (irrespective of temperature) domestic and industrial pipe systems during assembly. Can be safely and confidently used with drinking or waste water (hot or cold), gas, or compressed air. Sealings can be safely Made on brass, copper, stainless steel, cast iron, galvanised, chromed and nickel plated parts. Supplied in a handy, pocket sized, protective container complete with built-in cutter. WRAS approved material for use with potable water up to 85°C (meets BS 6920).