Kalrez® FFKM vs FKM (Viton®) O-Rings and Gaskets
Kalrez® FFKM and FKM (Viton®) are both fluorinated elastomer materials widely used for O-rings, gaskets, and custom sealing parts in demanding industrial applications. While they share some similarities in chemical resistance and temperature capability, they are designed for different performance levels and operating environments. FKM (Viton®) materials are commonly used in industrial sealing applications involving fuels, oils, and moderate chemical exposure, while Kalrez® FFKM is engineered for more extreme environments involving aggressive chemicals, elevated temperatures, plasma exposure, and high purity systems.
Kalrez® FFKM generally provides broader chemical resistance, improved high temperature performance, and lower compression set compared to FKM (Viton®). However, FKM materials often provide a more economical solution for applications that do not require the extreme capabilities of perfluoroelastomer compounds. Canyon Components supplies both Kalrez® FFKM and specialty FKM (Viton®) compounds including GLT, GFLT, ETP, GF, and other advanced formulations. We also offer Canrez® FFKM materials as a competitively priced alternative with fast lead times and extremely high quality for customers requiring advanced sealing performance.
Common names include: Perfluoroelastomer, fluorocarbon elastomer, FFKM, FKM
Trade names include: Kalrez®, Canrez®, Chemraz®, Viton®, Fluorel®, Tecnoflon®
FFKM O-rings from Canyon Components providing excellent chemical, heat, and compression resistance in critical sealing applications.
Kalrez® 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!
Canyon Components stocks Kalrez O-rings in AS568, JIS, and Metric sizes with custom molded FFKM part options.
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Features of Kalrez® FFKM Compared to FKM (Viton®)
- Kalrez® FFKM provides broader chemical resistance than most FKM (Viton®) compounds, including improved resistance to strong acids, solvents, and aggressive process chemicals
- FFKM materials generally maintain sealing performance at higher temperatures than FKM (Viton®), often exceeding 260°C depending on compound selection
- Kalrez® FFKM O-rings and gaskets offer lower compression set in extreme environments, supporting long-term sealing reliability
- FFKM materials provide superior plasma resistance and lower outgassing for semiconductor and vacuum applications
- Specialty FKM (Viton®) compounds such as GLT, GFLT, and ETP offer improved low temperature flexibility and targeted chemical resistance for demanding applications
- FKM (Viton®) materials are often a cost-effective solution for applications involving fuels, oils, and moderate chemical exposure
Limitations of Kalrez® FFKM Compared to FKM (Viton®)
- Kalrez® FFKM materials have a significantly higher cost than most FKM (Viton®) compounds
- Lead times for FFKM materials may be longer depending on compound and geometry requirements
- FKM (Viton®) generally offers better value for applications that do not require extreme chemical resistance or ultra-high temperature capability
- Both FFKM and FKM have limitations at very low temperatures compared to silicone or fluorosilicone materials, though specialty GLT and GFLT FKM compounds improve low temperature performance
- Over-specifying FFKM in moderate industrial environments can increase cost without providing meaningful performance advantages
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 Kalrez® FFKM vs FKM (Viton®) O-Rings and Gaskets
Kalrez® FFKM and FKM (Viton®) O-rings, gaskets, and custom parts are selected based on operating temperature, chemical exposure, pressure, and purity requirements. Choosing between these materials depends on balancing performance needs, expected service life, and cost considerations.
Canyon Components provides engineering support to assist with material selection, compatibility analysis, and sealing optimization. Our team can help evaluate whether a high-performance FFKM solution or a specialty FKM (Viton®) compound is best suited for your application. We also provide supporting documentation including Datasheets, TDS, Test Reports, MTR documentation, and MSDS or SDS resources to support qualification and performance validation.
Chemical Processing
Kalrez® FFKM is commonly selected for aggressive chemical environments where standard FKM (Viton®) compounds may degrade over time
Oil and Gas Industry
Specialty FKM (Viton®) compounds are widely used in hydrocarbons and elevated temperatures, while FFKM is often selected for the most aggressive conditions and explosive decompression environments
Semiconductor Manufacturing
Kalrez® FFKM is preferred for plasma resistance, low outgassing, and high purity applications beyond the capability of standard FKM (Viton®) materials
Food and Pharmaceutical Systems
Both FKM (Viton®) and FFKM can be used depending on chemical exposure and temperature requirements, with FFKM often selected for aggressive cleaning and sterilization processes
Industrial Equipment and Fluid Handling
FKM (Viton®) O-rings and gaskets are commonly used for cost-effective sealing in oils, fuels, and moderate chemical environments, while FFKM is reserved for the harshest applications
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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