The Difference between FPM, FKM and Viton^®

The terms FPM, FKM and Viton® very often cause confusion and lead to incorrect interpretations. All of these designations actually stand for one single base material-fluoro rubber.

FPM is the international abbreviation according to DIN/ISO
FKM is the short form for the fluoroelastomer category according to the American standard ASTM.
Viton® is the registered trade mark of DuPont Performance Elastomers.