Markez® FFKM

An Advanced Material for Chemically Resistant, High Pressure & High Temperature O-Rings

Markez is a high performance perfluoroelastomer (FFKM) o-ring material that offers unmatched value for demanding sealing applications. Produced from nearly identical ingredients as higher priced brands, Markez compounds are used for high temperature o-rings, high pressure o-rings, and chemically resistant o-rings that deliver similar performance to major FFKM brands, with temperature resistance up to 625°F, at a significantly lower cost. Our proprietary processing allows us to supply seals under an inch in size more efficiently. Introduced exclusively to existing customers more than 15 years ago, we now have the experience and capacity to offer Markez high temperature o-rings and high pressure o-rings to the world.

Markez compound #Z1028 is our most popular general purpose FFKM due to its relatively low cost and broad range of chemical and temperature resistance up to 610°F (320°C). Popular sizes are available in stock with rush manufacturing options available. Used as an effective alternative to Kalrez® 6375, 4079, and 7075 in countless applications across various industries like petro-chem, paint, and ink where resistance to harsh solvents is required.

We welcome the opportunity to assist you in selecting the compound that provides the best value for your application. Our expert FFKM material engineers look forward to presenting the test data examples of why Markez offers the best value in the industry. Our Markez product line manager has more than 25 years of experience, including production and application engineering supporting worldwide brands to determine the best value product to perform in demanding applications.

Markez® high temperature resistant o-rings are in stock and available to buy online. Explore Markez® compounds and compatibility below or contact us for assistance in selecting the best material for the job.

Explore Markez Compounds

The information on this page is to the best of our knowledge accurate and reliable. However, Marco Rubber makes no warranty, expressed or implied, that parts manufactured from this material will perform satisfactorily in the customer's application. It's the customer's responsibility to evaluate parts prior to use.

The temperature ranges presented on this page are approximations for dry air service only and should not be used to determine design specifications or end-use temperature limits. Actual temperature range of a compound in an end-use application is highly dependent on part type, hardware configuration, applied forces, chemical media, pressure and thermal cycling effects, and other factors. The most practical way of determining an end-use temperature range is testing in the actual application conditions. Consult a Marco Engineer for more details.

Additional Material Information

Common Names

Perfluoroelastomers, FFKM

Trade Names

Chemraz®, Kalrez®, Markez®, Isolast®, Parofluor® , Perlast®.

General Description

Perfluoroelastomer (FFKM) is a highly fluorinated elastomeric family of compounds that provide the most resistance to chemicals and high temperature than any other elastomer in the market. FFKMs are considered the elastomeric equivalence to PTFE (Teflon) due to its excellent chemical and temperature resistance.

  • Excellent chemical resistance to most chemicals.
  • The highest temperature resistant elastomeric material in the market.
  • Can be molded into o-rings, X-rings and a wide variety of custom shapes.
  • Available in many different compound and colors targeted for specific applications and markets
  • Compounds available to meet FDA, USP Class VI and Explosive Decompression Resistance requirements.
  • Molten alkali metals
  • Dynamic applications
Temperature resistance

-46°C to 327°C / -51°F to 620°F (Compound and application dependent)

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