FFKM Seals & O-Rings
Perfluoroelastomer Sealing Solutions for Extreme Chemical and High-Temperature Applications. When standard elastomers reach their limits, FFKM (Perfluoroelastomer) sealing materials provide the highest level of chemical resistance and temperature performance available in an elastomeric seal. M&P Sealing supplies FFKM O-rings, seals, gaskets, custom molded components, and engineered sealing solutions for demanding applications across chemical processing, refining, semiconductor manufacturing, pharmaceutical production, power generation, and oil & gas industries.
As an authorized distributor of Kalrez® and other high-performance sealing materials, we help customers identify the right FFKM compound for their operating conditions, media compatibility requirements, and performance goals.
Need help selecting the right FFKM material? Contact our sealing specialists for application support and pricing.
What Is FFKM (Perfluoroelastomer)?
FFKM, or perfluoroelastomer, is a premium elastomer material designed to combine the flexibility of rubber with chemical resistance approaching that of PTFE. FFKM materials are used in applications where conventional elastomers such as FKM (Viton®), EPDM, Nitrile, Silicone, or Neoprene cannot provide sufficient chemical compatibility, temperature resistance, or service life. Learn more about our PTFE Gaskets and Industrial Gaskets for additional sealing solutions.
Because FFKM materials resist a wide range of aggressive chemicals, solvents, acids, hydrocarbons, steam, and process media, they are often selected for critical sealing applications where equipment reliability and leak prevention are essential.
Industries frequently rely on FFKM seals to reduce maintenance costs, extend seal life, minimize downtime, and improve process safety in severe operating environments.
Why Choose FFKM?
Benefits of FFKM Sealing Materials
FFKM materials are often considered the highest-performing elastomers available for industrial sealing applications.
Exceptional Chemical Resistance
FFKM materials provide outstanding resistance to thousands of aggressive chemicals, including acids, solvents, hydrocarbons, amines, ketones, oxidizers, and process chemicals commonly encountered in industrial operations.
High Temperature Capability
Many FFKM compounds can operate continuously at temperatures exceeding 600°F (315°C), making them suitable for extreme heat and thermal cycling applications.
Extended Service Life
FFKM seals maintain their sealing performance longer than many conventional elastomers, helping reduce maintenance frequency and equipment downtime.
Superior Compression Set Resistance
Many FFKM compounds offer excellent recovery characteristics, allowing seals to maintain sealing force over extended service intervals.
Reduced Equipment Downtime
The longer service life and improved chemical compatibility of FFKM materials can significantly reduce unplanned shutdowns and maintenance costs. For applications requiring both elastomeric and metallic sealing technologies, M&P Sealing also manufactures Metal Gaskets and custom-engineered sealing solutions for demanding operating environments.
Kalrez® FFKM Compounds Available
M&P Sealing is an authorized distributor of Kalrez® perfluoroelastomer sealing products.
Popular Kalrez® compounds include:
- Kalrez® 4079
- Kalrez® 6375
- Kalrez® 7075
- Kalrez® 7090
- Kalrez® 7275
- Kalrez® 7375
- Kalrez® 7390
- Kalrez® W240
- Kalrez® W240UP
Explore our full selection of Kalrez® compounds and sealing solutions.
FFKM Material Properties
FFKM materials are engineered for applications where conventional elastomers cannot provide sufficient chemical compatibility, temperature resistance, or long-term reliability. By combining exceptional resistance to aggressive process media with high-temperature performance, FFKM compounds are commonly selected for critical sealing applications in chemical processing, refining, semiconductor manufacturing, pharmaceutical production, and other demanding industrial environments. The table below highlights the key performance characteristics that make FFKM one of the most capable elastomer families available for industrial sealing.
| Property | FFKM Performance |
|---|---|
| Chemical Resistance | Excellent |
| Temperature Capability | Up to 600°F+ depending on the compound |
| Steam Resistance | Excellent with properly selected compounds |
| Compression Set Resistance | Excellent |
| Oxidation Resistance | Excellent |
| Solvent Resistance | Excellent |
| Resistance to Aggressive Process Media | Excellent |
| Service Life in Harsh Environments | Excellent |
| Low-Temperature Flexibility | Varies by compound |
| Available Product Forms | O-rings, seals, gaskets, custom molded parts, and specialty components |
While FFKM materials provide exceptional performance in severe service environments, material selection should always be based on temperature, media compatibility, pressure, and equipment design. Our team can assist with selecting the proper Kalrez® compound, FFKM O-ring, or custom sealing solution for your application.
Available FFKM Products
M&P Sealing supplies a wide range of FFKM sealing products manufactured to customer specifications.
FFKM O-Rings
Standard and custom-sized O-rings manufactured from high-performance FFKM compounds.
FFKM Seals
Custom-engineered sealing solutions for pumps, valves, reactors, compressors, and process equipment.
FFKM Gaskets
Precision-cut and custom-manufactured gaskets for demanding chemical and thermal environments.
Custom Molded Components
Custom molded FFKM parts designed for specialized sealing and fluid handling applications.
Valve and Process Equipment Seals
Engineered sealing solutions for fugitive emissions control and critical process applications.
For applications requiring custom-cut sealing components, our Flash Cutting Services allow us to produce precision FFKM, rubber, PTFE, and non-metallic gasket materials with tight tolerances and fast turnaround times.
Industries Using FFKM Seals
FFKM materials are commonly used in:
Chemical Processing
Resistance to aggressive chemicals and process media.
Petrochemical & Refining
Reliable sealing in high-temperature hydrocarbon processing environments. Refining facilities frequently combine FFKM seals with Metal Gaskets in high-pressure and high-temperature process systems.
Semiconductor Manufacturing
Ultra-clean sealing materials for critical production processes.
Pharmaceutical Manufacturing
Chemical resistance and purity requirements for demanding process systems.
Power Generation
High-temperature sealing performance for critical plant equipment.
Oil & Gas
Chemical compatibility and reliability in harsh operating environments. Heat exchangers, reactors, pumps, valves, and process equipment frequently utilize FFKM sealing materials in conjunction with specialized Heat Exchanger Gaskets and engineered gasket solutions.
Why Choose M&P Sealing?
For over 80 years, M&P Sealing has supplied industrial sealing solutions for critical applications throughout North America.
We work closely with maintenance teams, engineers, purchasing professionals, and reliability specialists to identify the best sealing solution for each application.
In addition to FFKM materials, M&P Sealing supplies a wide range of Industrial Gaskets and sealing products for applications where elastomeric seals may not be the optimal solution.
Our manufacturing capabilities include Flash Cutting Services for precision-cut rubber, PTFE, non-asbestos, and specialty gasket materials.
Our capabilities include:
- Application engineering support
- Material selection assistance
- Reverse engineering services
- Custom gasket manufacturing
- Fast turnaround times
- Nationwide shipping
- Authorized Kalrez® distribution
FFKM vs. Viton® (FKM)
Both FFKM and Viton® (FKM) are high-performance fluoroelastomer materials used in industrial sealing applications, but they are designed for different operating conditions. While Viton® provides excellent performance in many chemical and high-temperature environments, FFKM materials offer broader chemical compatibility, higher temperature capability, and longer service life in the most aggressive applications. The comparison below highlights the key differences between these two sealing materials and helps identify when an upgrade to FFKM may be beneficial.
| Feature | FFKM | FKM / Viton® |
|---|---|---|
| Chemical Resistance | Excellent across a very broad range of aggressive chemicals | Very good, but more limited with certain chemicals and process media |
| High-Temperature Capability | Excellent; some compounds are rated for continuous service above 600°F | Very good; typically lower than FFKM depending on the grade |
| Steam Resistance | Excellent with the correct compound | Moderate to good depending on the formulation |
| Resistance to Amines, Ketones & Aggressive Solvents | Excellent with proper compound selection | May have limited compatibility |
| Compression Set Resistance | Excellent in severe operating conditions | Good to very good |
| Service Life in Harsh Applications | Often longer due to broader chemical and temperature resistance | Suitable for many general industrial applications |
| Typical Applications | Chemical processing, refining, semiconductor, pharmaceutical, and high-temperature service | Automotive, oil & gas, fuel systems, and general industrial service |
| Relative Material Cost | Higher | Lower |
| Best Use Case | Critical applications where seal failure, downtime, or chemical attack carries a high cost | Applications where FKM provides sufficient chemical compatibility and temperature performance |
While FFKM materials are often selected for the most demanding operating environments, many applications can be effectively sealed using other elastomers or engineered gasket materials depending on chemical exposure, operating temperature, and pressure requirements. Our sealing specialists can help determine whether FFKM, PTFE, metal, or composite sealing materials are the best fit for your application.
While Viton® performs well in many industrial sealing applications, FFKM materials are often selected when maximum chemical resistance, higher operating temperatures, and extended service life are required.
Need Help Selecting the Right FFKM Seal?
Whether you need a replacement Kalrez® O-ring, a custom-engineered sealing solution, or assistance identifying the proper FFKM compound, our sealing specialists can help.
Request a Quote Today
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M&P Sealing supplies a complete range of sealing solutions for critical industrial applications, including Kalrez® O-Rings, PTFE Gaskets, Metal Gaskets, Heat Exchanger Gaskets, and custom-engineered sealing products.