FFKM is a perfluoroelastomer with a fully fluorinated polymer backbone, giving it superior resistance to aggressive chemicals, high temperatures (up to 327°C), and vacuum conditions. According to Marco Rubber & Plastics, FFKM O-rings are widely used in critical sealing environments, offering benefits such as:
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Excellent resistance to plasma, amines, ketones, esters, and strong acids
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Ultra-low outgassing for vacuum and cleanroom compatibility
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Longevity and reduced downtime due to chemical durability
(Source: Marco Rubber Blog – 10 Benefits of FFKM)