Blue Monster PTFE Thread Seal Tape is a thicker denser general-purpose thread seal tape thats 5 times more tape than conventional rolls of low-density thin tapes. Fewer wraps are necessary to affect a leak-proof seal and it applies easily. No waste and no re-taping make sealing joints a breeze. Manufactured from PTFE (polytetrafluoroethylene) resin a polymer consisting of recurring tetrafluoroethylene monomers whose formula is (CF2-CF2)n. It is inert and compatible with a very wide range of materials. Use on threads made from galvanized steel iron brass copper aluminum stainless steel polyethylene polypropylene PVC (polyvinyl chloride) CPVC (chlorinated polyvinyl chloride) ABS (Acrylonitrile Butadiene Styrene) fiberglass and more.