pol·y·tet·ra·fluor·o·eth·yl·ene 
(pŏl′ē-tĕt′rə-flr′ō-ĕthə-lēn′, -flôr′-)
(pŏl′ē-tĕt′rə-flr′ō-ĕthə-lēn′, -flôr′-)n.
A thermoplastic resin, (C2F4)n, that is resistant to heat and chemicals, has an extremely low coefficient of friction, and is used as a coating on cookware, gaskets, seals, and hoses.