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FFKM o-rings and Perfluoroelastomer materials provide the highest temperature (up to 620°F) and most universal chemical resistance of any rubber o-ring and gasket material. FFKM o-rings are utilized in the most demanding applications with dozens of compounds engineered for targeted application performance like low or high temperature, chemical compatibility and industry compliance.

Allorings.com has the world’s largest inventory network of high performance o-rings, including thousands of non-standard sizes that can be custom-made within a few weeks, typically without tooling fees. For high-performance applications, your FFKM o-rings are available and ready to ship today.

FFKM O-Ring Material Comparison Table

FFKM O-Rings are available in a variety of brand names like Kalrez ®, Chemraz ®, Simriz ® and Markez ®. Refer to our FFKM O-Ring material comparison chart to compare relative price and performance properties some of the more popular Perfluoroelastomer FFKM materials.

Compound Number
Brand
Color
Durometer (Shore A)
Relative Price
Typical Inventory Level
Compare To
High Temp (° F)
Low Temp (° F)
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
                                                 
Z1028 Markez® Black 75 dollar sign 2 Inventory Level 4 Kalrez® 6375
Kalrez® 4079
Kalrez® 7075
610 (320ºC) 5 (-15ºC) square   square             square square square   square square  
Data Sheet Best value general purpose performance, higher temperature resistance, wide chemical compatibility.
Z1352 Markez® Black 75 dollar sign 3 Inventory Level 1 Kalrez® 6375 
Kalrez® 6380
Kalrez® 1050LF
500 (260ºC) 5 (-15ºC) square square square               square square   square   square
Data Sheet  General purpose, good in most acids, solvents, improved hot amine and steam resistance with wide range of chemical compatibility.
Z1026 Markez® Black 75 dollar sign 1 Inventory Level 2 Kalrez® 6375
Chemraz® 505
480 (250°C)  5 (-15°C)                      square      square    square 
  General purpose, good resistance to most paint solvents use in spraying applications.
SZ485 Simriz® Black 75 dollar sign 2 Inventory Level 3 Markez® Z1028
Markez® Z1026
450 (230ºC) 20 (-5ºC)                           square    
  Simriz® SZ485 - General purpose, not for use with steam or strong acids.
Z1416 Markez® Black 75 O-Ring Prices O-Ring Prices Kalrez® 6320
Kalrez® LS222
610 (320ºC) -5 (-15ºC) O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices
FDA compliant, higher temperature resistance, wide chemical compatibility.
Z1400 Markez® Black 75 O-Ring Prices O-Ring Prices Kalrez® 7075
Kalrez® 4079
Kalrez® 8900
635 (335ºC) -5 (-15ºC) O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices O-Ring Prices
Highest temperature FFKM with best long term compression set resistance up to 335ºC, short exposures up to 350ºC, Low outgassing,high purity Wide range of chemical resistance, acid, solvent resistance.
Z1401 Markez® Black 80 dollar sign 3 Inventory Level 1 Chemraz® 615
Kalrez® 4079
620 (325ºC) -20 (-30ºC)                       square     square  
  Wider temperature resistance range, general purpose high temp material.
Z1029 Markez® White 75 O-Ring Prices O-Ring Prices Chemraz® 513
Kalrez® 2037
Kalrez® 8575
575 (300ºC) 5 (-15ºC) O-Ring Prices O-Ring Prices O-Ring Prices
General purpose white, good resistance to oxidation and high temperature exposure.
Z1318 Markez® White 75 dollar sign 3 Inventory Level 1 Kalrez® 6221
Kalrez® LS205 
Chemraz® 625
500 (260ºC) 5 (-15ºC)           square square           square      
  USP Class VI and FDA compliant white FFKM with wide range compatibility.
C505 Chemraz® Black 75 dollar sign 3 Inventory Level 3 Markez® Z1028
Markez® Z1026
450 (230ºC) -20 (-30ºC)                     square square   square   square
  Chemraz® C505 - General purpose, not for use with steam or strong acids.
C605 Chemraz® Black 80 dollar sign 3 Inventory Level 2 Markez® Z1028 500 (260ºC) -5 (-20ºC)   square square     square       square square square square      
  Chemraz® C605 - General purpose.
Z1321 Markez® Black 75 dollar sign 4 Inventory Level 1 Kalrez® 0040 480 (250ºC) -50 (-45ºC) square   square             square square square     square square
  Improved low temperature resistance for use in oilfield and gas exploration, wide chemical resistance.
Z1412 Markez® Black 90 dollar sign 4 Inventory Level 1 Kalrez® 7090
Kalrez® 3018
Chemraz® 510
590 (310ºC) 5 (-15ºC) square   square square square           square square        
Data Sheet Higher temperature resistance Norsok M710 AED explosive decompression resistance, excellent resistance to Sour gas and associated chemicals and steam.
Z1322 Markez® Black 90 dollar sign 4 Inventory Level 1 Kalrez® 0040 465 (240ºC) -50 (-45ºC) square square square   square           square square        
  Lower temperature resistance, AED explosive decompression resistance, providing the best overall temp range and Chemical resistance.
K6375 Kalrez® Black 75 dollar sign 4 Inventory Level 3 Markez® Z1028 525 (275ºC) -5 (-20ºC) square square square                 square        
  Kalrez® K6375 - General purpose.
C615 Chemraz® Black 80 dollar sign 4 Inventory Level 3 Markez® Z1028
Markez® Z1401
620 (325ºC) 0 (-18ºC)                   square square square     square  
  Chemraz® C615 - Higher temperature resistance general purpose,not for use with steam.
K7075 Kalrez® Black 75 dollar sign 5 Inventory Level 2 Markez® Z1028
Markez® Z1401
620 (325ºC) 20 (-5ºC) square   square             square square square     square  
  Kalrez® K7075 - Higher temperature resistance general purpose.
K4079 Kalrez® Black 75 dollar sign 5 Inventory Level 3 Markez® Z1028
Markez® Z1401
600 (315ºC) 20 (-5ºC)                   square square square     square  
  Kalrez® K4079 - Higher temperature resistance, not for use with steam.
C526 Chemraz® Black 95 dollar sign 5 Inventory Level 2 Markez® Z1322 475 (245ºC) -5 (-20ºC)     square   square           square          
  Chemraz® C526 - Explosive decompression.
Z1403 Markez® White 75 dollar sign 3 Inventory Level 1 Kalrez® 7275
Kalrez® 8575
Kalrez® 9500
600 (315ºC) -20 (-30ºC)               square square square            
  Improved plasma resistance, higher purity, wider temperature range, low extractables.
Z1407 Markez® Clear Amber 75 O-Ring Prices O-Ring Prices Kalrez® 9100 540 (280ºC) 20 (-10ºC) O-Ring Prices O-Ring Prices O-Ring Prices
Higher purity clear translucent, semiconductor and laser grade material, excellent plasma resistance.
Z1411 Markez® Clear Amber 62 dollar sign 4 Inventory Level 1 Kalrez® 8002 535 (280ºC) 5 (-15ºC)               square square square            
  Higher purity amber tinted clear, same as Markez® Z1407 but lower durometer for lower compression force for delicate applications.
K8575 Kalrez® White 62 dollar sign 6 Inventory Level 2   575 (300ºC) 20 (-5ºC)                 square square            
  Kalrez® K8575 - High temperature semiconductor processing.
K9100 Kalrez® White 74 dollar sign 6 Inventory Level 2   575 (300ºC) 20 (-5ºC)               square square square            
  Kalrez® K9100 -Higher purity translucent white.                                    

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