Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 82 Did you know? The original fluroelastomer was developed by DuPont in 1957 in response to high performance sealing needs in the Aerospace industry. FPM is the international designation according to ISO. FKM is the ASTM designation. They both mean the same thing... Fluroelastomer! The Definition FKM / FPM or Fluoroelastomers are used in a wide variety of high performance applications. Long term reliability, with minimum change to the environment are the main factors that make Fluoroelastomers a vital polymer. These elastomers are specifically designed to be highly resistant to elevated temperatures (204°C continuous and 300°C intermittent) and aggressive chemical changes. Fluoroelastomers have great compression, sunlight and ozone resistance as well as a low gas absorption rate.