PTFE (polytetrafluoroethylene) is more well known by its brand or commercial name, Teflon.
It works so well on Sebenzas that CRK used to package and sell a Teflon lube under their name before they switched over to fluorinated grease. On my Sebenza I sometimes use a thick PTFE grease product under a very small, light application of a less viscous oil product. The combo is amazing.