// Material · FKM

FKM (Viton-type).

FKM — often called Viton — is the choice for the most aggressive duty: high heat with oil, fuel and chemical exposure. We mould and extrude it into seals, gaskets and O-rings for petroleum, chemical and high-temperature systems.

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Key properties

Typical ranges
Temperature range−20°C to +200°C
Hardness70–90 Shore A
Oil / fuel / chemicalExcellent
Heat resistanceExcellent
Low-temp / steamLimited

Indicative ranges; the exact grade and hardness are matched to your application.

// Why FKM

For the harshest service.

Chemical resistance

Stands up to fuels, oils, solvents and many aggressive chemicals.

High heat

Holds sealing performance at sustained high temperature.

Petroleum duty

A default for fuel-system and processing seals.

Low compression set

Keeps sealing under heat and pressure.

// Forms we make

Moulded and extruded.

Moulded

O-rings, seals and gaskets to drawing.

Extruded

Profiles and cords for chemical and high-heat sealing.

// Best for

Where it fits.

Automotive & fuel

Fuel-system and high-heat engine seals.

Chemical & process

Seals exposed to solvents and aggressive media.

Industrial OEMs

High-temperature sealing to spec.

// Honest limits

Where we'd point you elsewhere.

Low temperature & steam

FKM stiffens in deep cold and isn't ideal for steam — for those we recommend silicone or EPDM.

// FAQ

Common questions.

What is FKM (Viton) used for?

High-heat sealing combined with oil, fuel and chemical resistance — fuel systems, chemical processing and hot engine environments.

Is Viton the same as FKM?

Viton is a well-known brand of FKM fluoroelastomer; we supply FKM compounds of equivalent type.

Does FKM work in cold temperatures?

FKM stiffens in deep cold; for low-temperature service we recommend silicone or specialised grades.

Need an FKM part?

Send a drawing, sample or spec — we'll recommend the material and come back to you.

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Explore our materials — Silicone, EPDM, FKM, NBR, Neoprene and SBR →