What is a PTFE washer? Teflon or PTFE washers are flat discs with a centrally located hole. They have superior antifriction properties, as well as excellent chemical and corrosion resistance. These washers are ideal for low-temperature applications. These washers are typically used as insulators in electronic equipment.What are PTFE washers used for? PTFE washers are mainly used in the presence of aggressive chemicals: such as acids, bases and solvents. We manufacture PTFE washers in a range of dimensions and thicknesses as standard or bespoke parts. Washers can be produced to the tolerances and shapes that you require. PTFE (Polytetrafluoroethylene) is an inert material so has excellent chemical resistance. PTFE washers are mainly used in the presence of aggressive chemicals: such as acids, bases and solvents. Is PTFE harmful to humans? Unlike PFOA and PTFO, PTFE is not considered to be a health risk, but there's still a lot of attention over its safety. After much research, it's been determined that PTFE isn't toxic and that's it's safe for human consumption.