Cri-Line® FKM Compounds

Fully formulated high performance FKM compounds developed, tested, and certified by Cri-Tech. Cri-Line® FKM compounds range from 65% to 71% fluorine, bisphenol or peroxide cure system, and specialty grades such as BRE (base resistant) and low temperature. Several standard colors are offered and custom color matching is available.

Contact Us Today to Learn More About Our Cri-Line® FKM Compounds

Our sales and technical staff will discuss your application and processing requirements to help select a compound that meets your needs from one of our standard product families listed below. If your specification or application is not served by one of Cri-Tech’s standard products, we will develop a custom solution for you.

Typical Property Data

Cri-Tech employs extensive compounding technologies to offer Cri-Line® FKM Compounds with a wide range of available properties.

UnitCri-Line® FKM
HardnessDurometer (Shore A)50 – 95
Specific Gravity1.5 – 2.2
Elongation%75 – 400
Tensile strengthMPa10 – 20+
100% ModulusMPa2 – 10+
Compression set% (Plied discs 22 hrs @ 200°C)5 – 30
Mooney Viscosity(ML1+10 @ 121°C)45 – 110

General Purpose Compounds

66% fluorine copolymers formulated for molding complex geometric shapes exhibit improved hot tear resistance properties and are offered in a variety of colors. Typical applications include diaphragms, valve stem seals, hydraulic packaging, plumbing, roll covers, and small engine.

Intermediate Fluorine Compounds

68% fluorine terpolymers formulated for improved chemical resistance are good choices for fuel applications. Typical applications include diaphragms, fuel hoses, shaft seals, expansion joints, pipe & tank liners, chemical processing, and diesel.

High Fluorine Compounds

70% fluorine terpolymers formulated for much improved chemical resistance are excellent choices for fuel applications including methanol-containing fuels. Typical applications include fuel hoses, shaft seals, pipe & tank liners, down-hole packers, chemical processing, and diesel.

High Fluorine – Low Temperature Compounds

High fluorine tetrapolymers formulated for low temperature flexibility are excellent choices for fuel applications including methanol-containing fuels where low temperature flexibility is also essential.

Low Cost Compounds

66% fluorine copolymers formulated for low cost are used in lathe cut and custom molded goods, including valve stem seals.

Specification Grade Compounds

66% fluorine copolymers formulated for ultimate compression set resistance are the best choice for O-rings. Typical applications include O-rings for automotive and aerospace, shaft seals, valve cover gaskets, blowout preventers, sheet packings, and small engine.

FDA – Compliant for Food Contact Compounds

66% fluorine copolymers formulated with compounding ingredients approved for food contact listed in U.S. FDA 21 CFR 177.2600(c)(4)(1).

Specialty Compounds

Low Viscosity Compounds are formulated for injection molding and exhibit improved hot tear resistance.

Low Shrinkage Compounds are designed to give part shrinkage (out of the mold) and post-curing operation comparable to a nitrile or similar elastomer. In most cases, tooling changes are not required when switching over to an LS compound.

No Post Cure Compounds are designed to achieve high tensile and modulus values with good compression set and aging characteristics without requiring a post cure.

Thick Cross Section Compounds are fissure resistant in thick cross sections and also exhibit enhanced rubber-to-metal bonding.

Custom Color Compounds are color matched for our customers in the consumer market with tight batch-to-batch color consistency and contamination-free requirements. Virtually any color is available from light and pastel to dark and vibrant.

Tetrafluorethylene / Propylene (TFEP)

55% fluorine copolymers of tetrafluoroethylene and propylene. TFEP compounds exhibit outstanding resistance to hot water, steam, acids and alkalis. These compounds also give superior performance in amines and phosphate esters as compared to conventional fluoroelastomers and typical applications include chemical processing and wire & cable coatings.

Contact Us

Our sales and technical staff will be glad to discuss your application and help select a product that meets your needs.
If your specification or application is not served by one of Cri-Tech’s standard products, we will develop a custom solution for you.