FKM (Fluoroelastomer)
High-temperature fluoroelastomer for turbo, oil and EV thermal seals.
Overview
FKM fluoroelastomers (the Viton-class family) are high-temperature, fuel- and oil-resistant seals used around turbochargers, exhaust-adjacent joints and, increasingly, EV thermal-management loops where coolant and dielectric-fluid resistance at temperature is required. They sit well above silicone rubber for hydrocarbon resistance and well above NBR for heat. This is not a generic Rubber page and not silicone: FKM is a fluorinated carbon-chain elastomer specified for the hottest, most chemically aggressive sealing duties. Typical forms are moulded O-rings, shaft seals and a smaller volume of hose and gaskets. Cost is high relative to EPDM or NBR, so use is targeted rather than body-wide.
Automotive Applications
Similar Materials
NBR / HNBR
Nitrile Rubber
Nitrile and hydrogenated nitrile elastomers for fuel, oil and powertrain hoses and seals.
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Inconel
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PA12
Polyamide 12
Unreinforced polyamide 12 for fuel and air lines, distinct from PA12/CF composite.
Properties
Category
Type
Fluoroelastomer
Available Forms
Key Properties
- High-temperature hydrocarbon resistance
- Turbo and EV thermal duty
- Distinct from silicone rubber
- Distinct from NBR/HNBR
- Premium seal cost
- Moulded seal forms