TFE Pipe Joint Tape is a low density grade of polytetrafluoroethylene (PTFE) pipe joint tape. TFE Pipe Joint Tape is a weather-resistant, flexible, non-stick, non-flammable and chemically inert tape that can be used at low temperatures. Behold the power of Hercules, products built to last and trusted by plumbers to withstand even the toughest conditions.