Perfluoropolyethers

Perfluoropolyethers (PFPEs), also known as perfluoroalkylether (PFAE) and perfluoropolyalkylether (PFPAE), are a class of organofluorine compound. Some types are synthetic liquid lubricants that have been used in the aerospace industry for over 30 years. The main properties of PFPE are being temperature resistant between and (depending on specific composites), having very low outgassing compared to other fluids (vapour pressure of ) and having a dielectric strength of around 15.7 MV/m.