Perfluoroelastomer (FFKM)
Perfluoroelastomer (FFKM) represents the highest-performance class of fluoroelastomers, offering near-universal chemical resistance and unmatched thermal stability. Chemically, FFKMs are fully fluorinated carbon-fluorine backbone polymers, similar in composition to PTFE, but with crosslinkable sites that impart elastomeric flexibility. This unique structure provides extreme resistance to virtually all chemicals, solvents, and oxidizers, while maintaining elastic sealing properties up to 600 °F (315 °C).
At Eutsler Technical Products, our FFKM compounds are formulated for mission-critical sealing in chemical processing, aerospace, semiconductor, and oilfield environments where no other elastomer can survive. Eutsler’s engineered FFKM solutions deliver long-term compression set retention, exceptional cleanliness, and chemical inertness, ensuring reliable performance under the harshest process conditions.
Performance Advantages
- Unmatched chemical resistance to nearly all chemicals, acids, amines, aldehydes, esters, ketones, and solvents — approaching PTFE inertness.
- Extreme temperature stability with continuous sealing to 600 °F (315 °C) and intermittent exposure above 620 °F (325 °C).
- Outstanding compression-set resistance retaining preload under prolonged heat and chemical exposure.
- Low gas permeability for excellent vacuum and high-pressure sealing integrity.
- Exceptional plasma and oxidative resistance ideal for semiconductor, aerospace, and chemical-reactor applications.
- Excellent resistance to aggressive fluids and rapid gas decompression under demanding pressure and reactive-gas environments.
- Non-flammable and non-reactive fully fluorinated backbone provides intrinsic flame resistance.
Applications
Eutsler’s custom FFKM compounds are used in the most demanding chemical and thermal sealing environments, where standard fluoroelastomers (FKM, AFLAS, FVMQ) are insufficient.
Typical applications include:
- Chemical-process gaskets and reactor seals
- Semiconductor wafer processing and plasma chamber seals
- Aerospace engine and fuel system O-rings
- Oil & gas packer elements and valve stem seals
- Pharmaceutical and bioprocessing equipment seals
- Analytical instrumentation and high-vacuum components
- High-temperature compression and static seals in aggressive media
FFKM elastomers are the pinnacle of sealing performance, providing maximum reliability in corrosive, oxidizing, or high-temperature conditions.
Superior Material Performance
Eutsler’s FFKM compounds exhibit:
- Tensile strength: 1,500 – 2,000 psi
- Elongation: 150 – 250 %
- Compression set: Excellent (< 20 % after 70 h @ 300 °C typical)
- Continuous temperature resistance: up to 600 °F (315 °C)
- Chemical compatibility: Near-universal — resistant to > 1,800 chemicals
- Low outgassing and extractables: ideal for cleanroom environments
- Exceptional vacuum retention and gas impermeability
- Superior dimensional stability and aging resistance under oxidative stress
Note: While FFKM offers unparalleled chemical and thermal resistance, it has lower tear and abrasion strength compared to other fluoroelastomers and higher material cost.
For cost-sensitive applications at lower temperature, FKM or AFLAS® (TFEP) may be suitable alternatives.
General Characteristics of FFKM Elastomers
| Property | Typical Range / Rating | Comments |
|---|---|---|
| Durometer Range (Shore A) | 60 – 95 | Broad range for static and dynamic seals |
| Tensile Strength (psi) | 1,500 – 2,000 | Strong for high-temperature elastomer |
| Elongation at Break (%) | 150 – 250 | Moderate flexibility |
| Compression Set | Excellent | Retains seal integrity at 600 °F |
| Resilience / Rebound | Fair | Controlled elasticity; stable under load |
| Abrasion Resistance | Fair | Not intended for dynamic friction |
| Tear Resistance | Fair | Lower than FKM or HNBR |
| Oil Resistance | Outstanding | Compatible with all hydrocarbons and lubricants |
| Fuel Resistance | Outstanding | Performs in aviation, aromatic, and oxygenated fuels |
| Solvent Resistance | Outstanding | Unaffected by nearly all organic solvents |
| Chemical Resistance | Exceptional | Broadest of any elastomer |
| Low-Temperature Usage | –20 °F (–30 °C) | Retains elasticity in cold environments |
| High-Temperature Usage | +600 °F (315 °C) | Continuous service; short-term to 620 °F |
| Weather / Ozone / Sunlight Resistance | Outstanding | Inherently stable to UV and ozone |
| Gas Permeability | Extremely Low | Ideal for vacuum and gas containment |
| Flame Resistance | Excellent | Self-extinguishing; non-reactive |
| Adhesion to Metals | Good | Can be bonded with specialized systems |
Get in Touch with Our Experts Today!
Work with Eutsler for Precision-Molded FFKM Components
With over 60 years of elastomer expertise, Eutsler Technical Products specializes in custom-formulated FFKM seals and molded components for critical chemical and thermal environments.
Our team optimizes polymer grade, cure chemistry, and filler systems to deliver superior compression-set resistance and chemical compatibility for each application.
As an ISO 9001:2015-certified manufacturer, Eutsler guarantees traceable quality control, compound integrity, and repeatable performance from prototype through production.
Request a quote today to engineer high-performance FFKM seals designed for long-term operation in the world’s most extreme environments.
Summary
Perfluoroelastomer (FFKM) is the ultimate sealing material — offering unparalleled chemical and thermal resistance where failure is not an option.
Eutsler Technical Products delivers precision-molded FFKM components that ensure absolute sealing integrity in the most aggressive and high-temperature environments on earth.
- Chemical Family: Fully Fluorinated Perfluoroelastomer (FFKM)
- Service Temperature Range: –20 °F to +600 °F (–30 °C to +315 °C)
- Distinguishing Features:Ultimate chemical and heat resistance; PTFE-like inertness with elastomeric recovery
- Key Advantages:
- Near-universal chemical compatibility
- Continuous sealing to 600 °F (315 °C)
- Excellent compression-set resistance under extreme conditions
- Low gas permeability and exceptional vacuum performance
- Clean, non-reactive, and plasma-resistant for high-purity applications
- Limitations:
- High material cost
- Moderate mechanical strength (tear / abrasion)
- Limited flexibility at low temperatures
Why Choose Eutsler Technical Products?
R&D
Experienced staff develop high performance and long life parts
Material Selection
Over 300 compounds or custom elastomeric compounds available
Mold Design
Custom molds are designed ensuring tolerances are met
Manufacturing
Molding, extrusion and die cutting services to build your part
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