Product Description Mill-Rose 76005 Millrose Monster 16 Fluid Ounce Heavy-Duty Industrial Grade with PTFE, Blue From the Manufacturer BLUE MONSTER PTFE pipe thread sealant is formulated with PTFE resin, a polymer consisting of recurring tetrafluoroethylene monomers whose formula is (CF2-CF2). It is inert and compatible with a very wide range of materials. Use Blue Monster on threads made from all metals, PVC, CPVC, ABS and nylon plastic pipe systems.