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
Compound # | Datasheet | Color | Hardness (Shore A) | Comparable Compounds | High Temp °F (°C) | Low Temp °F (°C) | Strong Acids | Hot Amines | Steam < 300 °F | Steam > 550 °F | Explosive Decompression | USP Class VI Medical Grade | FDA Compliant | Improved Compression Set Resistance | Plasma Resistance | Semicon | Oil and Gas | Chemical Processing | Life Sciences | Paint Spray Solvents | Aerospace | Alternative Fuels | Features |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Black | 75 | Kalrez® 6375 Kalrez® 4079 Kalrez® 7075 | 610 (321) | 5 (-15) | Best value general purpose performance, higher temperature resistance, wide chemical compatibility. | |||||||||||||||||
| Black | 75 | Kalrez® 6375 Kalrez® 6230 Kalrez® LS205 | 525 (274) | 5 (-15) | Low cost performance value, nearly universal chemical compatibility, acid, amines, solvents, compression set resistance, FDA compliant and USP Class VI medical grade. | |||||||||||||||||
| Black | 75 | Kalrez® 6375 Kalrez® 6380 Kalrez® 1050LF | 500 (260) | 5 (-15) | General purpose, good in most acids, solvents, improved hot amine and steam resistance with wide range of chemical compatibility. | |||||||||||||||||
| Black | 75 | Kalrez® 6375 Chemraz® 505 | 480 (249) | 5 (-15) | General purpose, good resistance to most paint solvents use in spraying applications. | |||||||||||||||||
| Black | 75 | Kalrez® 6230 Kalrez® LS222 | 610 (321) | -5 (-21) | FDA compliant, higher temperature resistance, wide chemical compatibility. FDA compliant version of our flagship Z1028 compound. | |||||||||||||||||
| Black | 75 | Kalrez® 7075 Kalrez® 4079 Kalrez® 8900 | 635 (335) | -5 (-21) | Highest temperature FFKM with best long term compression set resistance up to 335°C, short exposures up to 350°C, Low outgassing,high purity Wide range of chemical resistance, acid, solvent resistance. | |||||||||||||||||
| Black | 80 | Chemraz® 615 Kalrez® 4079 | 620 (327) | -20 (-29) | Wider temperature resistance range, general purpose high temp material. | |||||||||||||||||
| White | 75 | Chemraz® 513 Kalrez® 2037 Kalrez® 8575 | 575 (302) | 5 (-15) | General purpose white, good resistance to oxidation and high temperature exposure. | |||||||||||||||||
| White | 75 | Kalrez® 6221 Kalrez® LS205 Chemraz® 625 | 500 (260) | 5 (-15) | USP Class VI and FDA compliant white FFKM with wide range compatibility. | |||||||||||||||||
| Black | 75 | Kalrez® 0040 | 480 (249) | -50 (-46) | Improved low temperature resistance for use in oilfield and gas exploration, wide chemical resistance. | |||||||||||||||||
| Black | 90 | Kalrez® 7090 Kalrez® 3018 Chemraz® 510 | 590 (310) | 5 (-15) | Higher temperature resistance Norsok M710 AED explosive decompression resistance, excellent resistance to Sour gas and associated chemicals and steam. | |||||||||||||||||
| Black | 90 | Kalrez® 0040 | 465 (241) | -50 (-46) | Lower temperature resistance, AED explosive decompression resistance, providing the best overall temp range and Chemical resistance. | |||||||||||||||||
| White | 75 | Kalrez® 7275 Kalrez® 8575 Kalrez® 9500 | 600 (316) | -20 (-29) | Improved plasma resistance, higher purity, wider temperature range, low extractables. | |||||||||||||||||
| Violet | 70 | Kalrez® 9100 Kalrez® 8575 Kalrez® 9300 | 536 (280) | -5 (-21) | High purity, plasma resistant, high service life, semiconductor specialty compound. | |||||||||||||||||
| Clear Amber | 75 | Kalrez® 9100 | 540 (282) | 20 (-7) | Higher purity clear translucent, semiconductor and laser grade material, excellent plasma resistance. | |||||||||||||||||
| Clear Amber | 62 | Kalrez® 8002 | 535 (279) | 5 (-15) | Higher purity amber tinted clear, same as Markez Z1407 but lower durometer for lower compression force for delicate applications. |
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.
