Viton (FKM) Rubber: High Temperature and Chemical Resistance
Viton is a high-quality synthetic rubber belonging to the fluoroelastomer (FKM) family. "Viton" is actually a trademark, but in industry it is widely used to refer to all materials in the FKM category. Thanks to the fluorine atoms in its molecular structure, this material exhibits exceptional resistance to heat, oil and aggressive chemicals.
Why is Viton chosen?
The main advantage of FKM material is its ability to withstand extreme operating conditions. Its main properties:
- High temperature resistance — it can operate continuously at +200 °C and, for short periods, up to +250 °C.
- Superior chemical inertness — it remains stable in the presence of oils, fuels, acids, solvents and hydrocarbons.
- Excellent ozone and weather resistance — it does not degrade for many years outdoors.
- Low gas permeability — it is ideal for vacuum and gas-containment systems.
The importance of the temperature limit
Ordinary rubbers, such as SBR or natural rubber, harden and crack quickly above 80–100 °C. Viton, however, retains its elasticity at these temperatures thanks to the strong carbon-fluorine bonds in its molecular chain. This property makes it indispensable in high-temperature environments such as engine compartments, industrial furnaces and petrochemical plants.
Where is Viton important?
FKM rubber is used especially in areas where safety and durability are critical:
- O-rings and seals in the oil & gas and petrochemical industries;
- Automotive fuel systems, engine and transmission seals;
- Chemical pumps, valves and reactor seals;
- Aviation and hydraulic systems;
- Seals for high-temperature processing equipment.
Since Viton is an expensive material, choosing it for every application is not economically sensible. When the environment is oily but the temperature is normal, NBR rubber may be sufficient; and when weather and ozone resistance is the priority, EPDM is a more cost-effective alternative. For a broad comparison of materials, you can read our article Comparison of EPDM, NBR and silicone.
Advice for correct application
The reliability of a Viton component depends not only on the material but also on the correct compound formulation and vulcanization process. At NUR KAUÇUK LLC, FKM compounds are prepared under controlled conditions and undergo quality inspection so that the final product meets the required temperature and chemical limits.
In short: if there is high temperature and an aggressive chemical environment, Viton (FKM) is the most reliable solution in industry. The right material selection extends the life of equipment and reduces the risk of downtime.
Let's determine the right FKM solution for your application together. Explore our products and contact us to discuss your technical specifications.