PFA, or Perfluoroalkoxy, is a type of fluoropolymer. It has very similar properties as the more common polytetrafluoroethylene (PTFE), which is the more popularly known form of Teflon.
PTFE seals and sealing solutions are used in the more traditional sealing markets like pneumatics and hydraulics as well as in aerospace, energy, oil and gas, the life sciences sector and in the field of renewable energies.
PTFE's mechanical properties are low compared to other plastics, but its properties remain at a useful level over a wide temperature range of of -100°F to +400°F (-73°C to 204°C).