General Sealing Products / Solid Rubber Compound Grades

305 Perfluorelastomers (FFKM)

ASTM D-2000
Classification: KK

Custom Grades including MilSpec, Def STAN, NSN, AS & DTD available. Below is a sample of common grades. Contact us for your unique requirements.

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Temperature Range:

-26°C to +260°C (-15°F to +500°F).


The relative inertness of Fluorelastomers is provided by fluorine-carbon bonds on the elastomer backbone. The greater the fluorine content, the higher the resistance to chemical attack. Where fluorocarbon rubbers (FKM) have a fluorine content of 63% to 68 %, the Perfluorocarbons (FFKM) have a fluorine content of 73%. FFKM Perfluorelastomer have the best chemical resistance of all the elastomers, they have resistance to almost all chemicals, including inorganic acids, alkalines, ketones, esters, alcohols, fuels, and hot water and are used for applications in aggressive chemical environments with resistance to temperatures up to +326°C (+620°F).

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