The more common FluoroElastomers used and specified in various applications are Viton® (Dupont Elastomers) & Dyneon® (3M, also previously known as Fluorel®)

FluoroElastomers offers the widest range of fluid and chemical resistance of any commercial rubber. Excellent resistance to oils, fuels, lubricants and most mineral acids, this high performance synthetic rubber also has excellent temperature resistance, -10° to 400°F (-20° to 205°C) continuously.
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Standard durometers are from 50-90 Shore A. Special formulations can have your FKM seal meeting standard low temperatures as low as -25°F or as high as 550°F. (-30°C to 290°C)

Whether your application is aerospace, chemical processing or any number of other industrial applications, there is a particular type of Fluoroelastomer that best suits your specific performance requirements. The general purpose types differ from the specialty types primarily in terms of chemical resistance.

In the specialty family, the choice remains mostly between four types that are tailored for superior fluid resistance, low-temperature performance or combinations of these properties. Special care must be taken when requesting a Fluoroelastomer for your application due to the large variances in performance engineered compounds.