PolyTetraFluoroEthylene (PTFE), (Commonly known by DuPont’s trademark of Teflon®) is a thermoplastic member of the fluoropolymer family of plastics. PTFE has a low coefficient of friction, excellent insulating properties, and is chemically inert to most substances. It is useful level over a wide temperature range of of -100 degrees F to 400 degrees F (-73degrees C to 204 degrees C) and it is well known for its anti-stick properties. Due to its low friction, it is used for applications where sliding action of parts is needed: bearings, bushings, gears, slide plates, etc. Because of its chemical inertness, PTFE cannot be cross-linked like an elastomer. Therefore it has no memory, and is subject to creep (also known as cold flow and compression set). This can be both good and bad. A little bit of creep allows PTFE seals to conform to mating surfaces better than most other plastic seals. Too much creep, however, and the seal is compromised. Compounding fillers control unwanted creep, as well as to improve wear, friction, and other properties. Sometimes metal springs apply continuous force to PTFE seals to give good contact, while permitting some creep. Available in Rod and Sheet in various sizes please check with your nearest store for stock sizes.