FFKM vs FKM (Viton™)
When selecting sealing materials for demanding applications, FFKM (perfluoroelastomer) and FKM (fluoroelastomer, commonly known as Viton®) are two of the most widely used options. Both materials offer strong chemical resistance and high temperature capability, but they differ significantly in performance limits, cost, and application suitability.
FKM (Viton®) O-rings, gaskets, and custom parts are commonly used in applications involving oils, fuels, and moderate chemical exposure, with excellent performance in temperatures up to approximately 437°F (225°C). There are several specialized FKM types, including GLT, GFLT, XLT (low temperature grades), and ETP (extreme chemical resistance grades), which expand the usable range of FKM (Viton®) materials for more demanding environments.
However, for the most aggressive conditions, FFKM O-rings, gaskets, custom parts, and tubes provide the highest level of chemical resistance and thermal stability available in elastomers. At Canyon Components, Canrez® FFKM is engineered to outperform standard FKM (Viton®) materials in extreme environments, while offering competitive pricing and strong availability compared to Kalrez® and Chemraz®.
Understanding the differences between FFKM and FKM (Viton®) is critical to selecting the right material for your application, balancing performance requirements with cost considerations.
Common names include: FFKM (Perfluoroelastomer), FKM (Fluoroelastomer, Viton®), Fluoropolymer Elastomers. Trade names: Canrez®, Kalrez®, Chemraz®, Viton®, Fluorel®, Technoflon®, Dai-El®.
FFKM Materials Available
This table shows many of our standard materials and links out to our O-ring store. Get in touch with us if you need a custom gasket, custom molded part, or non-standard geometry!
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Features of FFKM vs FKM (Viton®) O-Rings, Gaskets, & Custom Parts
- FFKM O-rings, gaskets, and custom parts provide the highest level of chemical resistance, including compatibility with aggressive acids, solvents, and reactive chemicals
- FKM (Viton®) O-rings, gaskets, and custom parts offer excellent resistance to oils, fuels, and many hydrocarbons, making them ideal for general industrial use
- FFKM perfluoroelastomer materials offer superior high temperature performance, often exceeding 572°F (300°C), while FKM (Viton®) typically performs up to ~437°F (225°C)
- FKM (Viton®) specialty grades such as GLT, GFLT, and XLT provide improved low temperature flexibility, while ETP grades enhance chemical resistance
- FFKM O-rings, gaskets, and custom parts maintain low compression set and long-term sealing performance in extreme environments
- FKM (Viton®) O-rings, gaskets, and custom parts provide a cost-effective solution for applications that do not require full FFKM performance
- Canrez® FFKM offers a high-performance alternative with strong availability and competitive pricing compared to Kalrez® and Chemraz®
- Both FFKM and FKM (Viton®) materials are available in standard sizes and custom molded geometries, including O-rings, gaskets, and complex parts
Limitations of FFKM vs FKM (Viton®) O-Rings, Gaskets, & Custom Parts
- FFKM O-rings, gaskets, and custom parts have a higher upfront cost compared to FKM (Viton®) materials
- FKM (Viton®) materials have limitations in extreme chemical environments, particularly with strong acids, amines, and certain solvents
- FKM (Viton®) materials generally have lower maximum temperature capability compared to FFKM
- FFKM materials may be over-specified for less aggressive applications, where FKM (Viton®) provides sufficient performance at a lower cost
- Both materials require proper compound selection, as performance varies widely between formulations
Please consult a Canyon Components Engineer about your specific application and we will use our decades of experience to formulate a solution that fits your need.
Industrial Usage of FFKM vs FKM (Viton®)
FFKM and FKM (Viton®) O-rings, gaskets, custom parts, and tubes are used across a wide range of industries, with material selection depending on the severity of the operating environment. FFKM is typically chosen for the most demanding applications, while FKM (Viton®) is widely used for general-purpose sealing. Canyon Components helps customers evaluate their application requirements and select the most cost-effective solution.
Have questions about choosing between FFKM and FKM (Viton®)? Canyon Components can help you evaluate your application and select the right solution, including Canrez® FFKM O-rings, gaskets, custom parts, and tubes, or cost-effective FKM (Viton®) alternatives tailored to your needs.
Chemical Processing
FFKM O-rings, gaskets, and custom parts are used in highly aggressive chemical environments, while FKM (Viton®) is suitable for less severe chemical exposure
Oil & Gas Industry
FFKM is preferred for extreme conditions involving sour gas, high temperature, and aggressive fluids, while FKM (Viton®) is used in more standard oil and fuel applications
Semiconductor Industry
FFKM O-rings, gaskets, and custom parts are essential for plasma and high-purity environments, where FKM (Viton®) would degrade
Automotive & Aerospace
FKM (Viton®) O-rings, gaskets, and custom parts are widely used in fuel systems and general sealing applications, while FFKM is reserved for extreme environments
Pharmaceutical & Food Processing
FFKM is used in high-purity and aggressive cleaning environments, while FKM (Viton®) may be used in less demanding sealing points
Please consult a Canyon Components Engineer about your specific application and we will use our decades of experience to formulate a solution that fits your need.
All Other FFKM Types Available
Canrez® FFKM O-Rings & Custom Parts
Canyon Components supplies Canrez® FFKM O-rings, equivalent to Kalrez®, Chemraz®, and Parker® O-rings, in AS568, JIS, and Metric sizes. These perfluoroelastomer O-rings provide exceptional chemical resistance, high-temperature stability, and long-term sealing performance for semiconductor, pharmaceutical, and chemical processing applications. Custom molded Canrez® parts available.
Kalrez® vs Canrez®: Comparing FFKM Sealing Solutions"
Compare Kalrez® vs Canrez® FFKM for O-rings, gaskets, and custom parts. Learn the differences in performance, availability, and cost to choose the best perfluoroelastomer for your application.
Kalrez FFKM O-Rings, Gaskets & Custom Parts
Canyon Components supplies genuine Kalrez® FFKM O-rings, gaskets, and custom molded parts with exceptional chemical resistance and high-temperature performance. Available in AS568, Metric, and custom sizes, with Canrez®, Chemraz®, and Parker® O-ring equivalents for semiconductor, pharmaceutical, aerospace, and chemical processing applications.
Parker Hannifin Parofluor FFKM O-Rings, Gaskets & Custom Parts
Canyon Components supplies genuine Parker Hannifin Parofluor FFKM materials for extreme chemical resistance and high temperature sealing. Compare Parofluor with Canrez® FFKM for O-rings, gaskets, and custom parts in demanding applications.
Chemraz FFKM O-Rings, Gaskets & Custom Parts
Canyon Components supplies Chemraz® FFKM O-rings engineered for the most demanding sealing applications. Known for extreme chemical resistance and high-temperature stability, Chemraz® O-rings provide reliable sealing in semiconductor, pharmaceutical, aerospace, and chemical processing environments. Alternatives include Kalrez®, Canrez®, and Parker® FFKM O-rings in AS568, Metric, and custom sizes.
Simriz® FFKM from Freudenberg: O-Rings, Gaskets, and Custom Parts
Canyon Components is a distributor of Simriz® FFKM O-rings designed for extreme chemical resistance and high temperature applications. Compare Simriz® with Canrez® FFKM for O-rings, gaskets, and custom parts in demanding sealing environments.
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