Looking for high-performance O-rings that thrive under heat and chemical pressure? FKM O-rings — also commonly known by the brand name Viton® — are your go-to solution for extreme sealing conditions.
🔬 What is FKM?
FKM stands for fluoroelastomer, a premium synthetic rubber designed to withstand:
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Temperatures from –20 °C up to +200 °C (with peaks of 230 °C in some compounds)
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Chemicals like fuels, oils, acids, and solvents
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Ozone, UV and weathering over long periods
This makes them ideal for automotive, aerospace, chemical processing, and high-temperature industrial applications.
⚖️ FKM vs. NBR / Silicone: What's the Difference?
| Feature |
FKM (Viton®) |
NBR (Nitrile) |
Silicone |
| Temp Range |
–20 °C → +200–250 °C |
–40 °C → +120 °C |
–50 °C → +200 °C |
| Chemical Resistance |
Excellent (fuels, oils, solvents) |
Moderate |
Poor (especially fuels) |
| Ozone/UV Resistance |
Excellent |
Poor |
Excellent |
| Durability / Cost |
High durability, higher cost |
Budget friendly |
Flexible, mid-price |
Not sure what to choose? Get in touch and we’ll help!
🛠️ Common Uses of FKM O-Rings
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Fuel injectors & turbo kits
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Industrial pumps and valves
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High-performance engines
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Chemical sealing and lab equipment
