Polytetrafluoroethylene is best known by its commercial application, Teflon. PTFE handles high heat very well without changing its inherent physical properties. It also allows great movement with low friction resistance and is waterproof. As Teflon, PTFE is nowadays used as coating for most non-stick frypans. PTFE plastic products are often used wherever sliding or movement of components is required, such as seals, slide bearings, piston rings, electrical and thermal insulators. PTFE is used widely in plastic cookware and it is even used in the production of the material Gore-Tex.