Viton is a trade name commonly associated with FKM, a high-performance fluoroelastomer used for demanding sealing applications. It offers excellent resistance to fuels, mineral oils, many chemicals and higher temperatures, which makes it popular in automotive, industrial and hydraulic systems.

Compared with nitrile, Viton generally lasts longer in harsher conditions, but it also costs more. It is not suitable for every application either, particularly where steam, hot water or certain chemicals are involved. So, Viton is usually worth the extra cost when the seal is exposed to heat, fuel or aggressive fluids. For standard workshop or general-purpose applications, nitrile may still be the better-value option.

COMMON MISTAKES

• Assuming Viton is always better. It offers excellent resistance in many applications, but the correct material depends on the fluid and operating conditions.
• Using Viton with steam or hot water. FKM is generally not the first choice for these environments. EPDM is often more suitable.
• Choosing Viton purely because it handles high temperatures. Temperature is only one factor. Chemical compatibility, pressure and movement must also be considered.
• Confusing Viton with a completely different material. Viton is a brand name associated with FKM fluoroelastomer, not a separate rubber family.
• Paying extra when nitrile would do the job. For standard oil, grease and workshop applications at moderate temperatures, NBR is often the more economical option