O-Rings for High-Temperature Applications
Finding o-rings for high-temperature seals is always a challenge. High heat can cause the o-ring's material to break down, resulting in leaks, product contamination, and complete seal failure. For long-lasting success, o-rings that can withstand extreme high-temperature applications use materials like flexible graphite and FFKM.
It can be tempting to use inferior, cheaper materials, but this route ultimately becomes more expensive and time-consuming. Having the proper o-ring in place in a high-temperature application reduces downtime and maintenance costs.
Getting that o-ring is now easier than ever! Marco Rubber offers various materials, durometers, sizes, and customizable options for high-temperature o-rings. Our team is dedicated to making your experience easy, no matter the regulations or performance requirements.
We have the largest inventory of specialty and standard sealing solutions with rapid delivery. For custom solutions, we have some of the shortest lead times on the market.
High-Temperature O-Ring Materials
What happens when you use the wrong o-ring material in a high-temperature application? The temperature damages the o-ring, making it hard and brittle. It will no longer compress, return to its original shape (compression set), and preserve the seal. In turn, this often causes leaks or complete seal failure, leading to expensive downtimes and potentially dangerous messes. For industries that are sensitive to contamination, like food and beverage or pharmaceuticals, this can result in microscopic contamination as the o-ring breaks apart.
Below are the materials we most commonly recommend for extreme high-temperature applications.
View our Material Selection Guide for more information on these and other popular sealing materials.
High Temperature Material Comparison
Markez®: The Ultimate High-Temperature O-Ring FFKM Material
Markez® was born from the needs of our customers: a versatile, customizable FFKM material available at an affordable price and rapid lead time.
This is our high-performance perfluoroelastomer (FFKM) material that offers unmatched value for the most demanding sealing applications. Markez® is a cost-effective alternative to other high-temperature FFKM materials. With nearly identical ingredients, Markez® offers top-of-the-line performance at a fraction of the cost.
Better yet, we keep Markez® stocked. If we don't have it on hand, we can get you exactly what you need fast.
Markez® is available in ultraclean formulas and more!
Markez® Next Generation FFKM Perfluoroelastomer
An Advanced Material For Chemically Resistant, High Pressure & High Temperature O-Rings.
Markez® FFKM delivers similar performance to major FFKM brands, with temperature resistance up to 625 °F, at a significantly lower cost.
Browse High-Temperature O-Rings & Seals
Find the right o-ring for your high-temperature application.
Compound # | Datasheet | Material | Color | Hardness (Shore A) | Low Temp °F (°C) | High Temp °F (°C) | FDA* | FDA* | Explosive | Steam | Features |
|---|---|---|---|---|---|---|---|---|---|---|---|
V1000 |  | FKM | Black | 75 | -15 (-26) | 400 (204) | Lowest cost highest inventory general purpose commodity FKM (available in nearly any color and durometer) | ||||
L1000 | | AFLAS | Black | 80 | 15 (-9) | 450 (232) | General purpose, steam resistant, sour gas resistant, acid resistance, for chemical and oil industries (higher performance ALFAS® versions available for oil drilling environments) | ||||
Z1028 | | FFKM | Black | 75 | 5 (-15) | 610 (321) | Best value general purpose performance, higher temperature resistance, wide chemical compatibility, compare to KALREZ® 6375 and KALREZ® 4079 | ||||
Z1352 | | FFKM | Black | 80 | 5 (-15) | 500 (260) | Improved hot amine resistance, compare to KALREZ® 6380 and KALREZ® 1050LF | ||||
Z1400 | | FFKM | Black | 85 | 5 (-15) | 635 (335) | Ultra high temperature FFKM | ||||
Z1412 | | FFKM | Black | 90 | 5 (-15) | 590 (310) | Higher temperature NORSOK M710 AED explosive decompression applications, excellent resistance to sour gas and associated chemicals and steam | ||||
Z2000 | | FFKM | Black | 75 | 5 (-15) | 635 (335) | Ultra high temperature FFKM | ||||
Z2001 | | FFKM | Black | 80 | 5 (-15) | 610 (321) | Ultimate performance |
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.
Products listed above are our most popular high temperature seals. Hundreds more compounds are available. Contact us for more information or for assistance with custom requests.
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Marco Rubber & Plastics is an industry leader in custom sealing solutions that go beyond the limits of catalog commodities. Since 1980, our solutions have delivered reliable, long-lasting success for customers worldwide. We offer the largest inventory of specialty and standard sealing solutions backed by best-in-class technology, service and support.
