FFKM/FFPM

Trademarks: 

Novelast®, Dynalast®, Kalrez®, Zalak®, Chemraz®

FFKM called perfluorinated rubber

It replaces the FKM/FPM when it reaches its limits because it is even more resistant to high temperatures and has almost perfect chemical compatibility except with respect to other fluorinated products.

Use: 

It is suitable for acids, hydrocarbons and ozone