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By certification 
FKM and FFKM materials High personality FKM rubber seals offer the highest temperature and most general chemical resistance of all rubber seal materials. Brand: DuPont; Chemraz; Technoflon;
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| Heat resistance | up to 204°C (400°F) and higher, but with a shorter life expectancy. |
| Low temperature resistance | as low as about -26°C (-15°F) (some formulations as low as -46°C (-50°F)) |
| Chemical Resistance: | Mineral oils and greases, ASTM No. 1 oils, IRM902 and IRM903 oils. Non-flammable hydraulic fluid (HFD). Silicone oil and grease. Mineral oil, vegetable oil and grease Aliphatic hydrocarbons (butane, propane, natural gas); Aromatic hydrocarbons (benzene, toluene); chlorinated hydrocarbons (trichloroethylene and carbon tetrachloride). Gasoline (with high alcohol content). high vacuum. Has good ozone resistance, weather resistance and aging resistance. |
| Not compatible with(Â High personality FKM rubber seals) | Glycol based brake fluid. Ammonia, amines, alkalis. superheated steam. |
| Low molecular weight organic acids | formic and acetic acids (High personality FKM rubber seals) |
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fkm rubber seals are available for vacuum applications, very low contamination (outgassing and particulate emissions) or high temperature (392-572°F/200-300°C) operations that require extended backing or handling time, we recommend custom The clean and tidy manufacture of FFKM O-rings. After fabrication, these O-rings are plasma vacuum cleaned and/or vacuum baked to eliminate outgassing and provide vacuum tightness. After treatment, these FFKM rings can be used in UHV pressure applications.
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