Polytetrafluoroethylene (PTFE) also known as Teflon® is a synthetic fluoropolymer of tetrafluoroethylene. Invented by DuPont, PTFE can be modified and shaped for use as a gasketing material with strong chemical resistance properties.
Advantages of using PTFE include:
Not affected by most chemicals.
It can be used at temperatures up to 500°F (260°C).
The lowest coefficient of friction of any solid material.