FKM Rubber Gaskets (Viton / Fluoroelastomer)

FKM rubber gaskets — sold under the Viton trade name and also called fluoroelastomer gaskets — are specified when a flat static joint must survive high temperature, aggressive chemicals, or aromatic fuels that would degrade NBR or EPDM. The high fluorine content gives FKM outstanding resistance to oils, fuels, hydraulic fluids and a broad range of chemicals, together with continuous service up to +200°C. FKM flat gaskets are common in chemical processing, aerospace fuel systems, automotive turbo and fuel-injector flanges, and hot oil circuits. Standard hardness is 70–90 Shore A. Lower-fluorine grades are more economical; high-fluorine and specialty grades (e.g., GBL-type) extend steam, base and amine resistance but at higher cost. FKM is not recommended for steam, hot concentrated alkalis, or ketones. In those cases, AFLAS, EPDM or FFKM may be more appropriate. PTFE should be considered when universal chemical resistance is needed and the joint can tolerate a non-elastic seal. We supply FKM gaskets as die-cut parts, waterjet prototypes, and sheet stock. Send flange drawing or ID/OD/thickness, hardness, compound grade and operating fluid for a quote. FKM gaskets are single-use and should be replaced after disassembly.