FFKM O-Rings (Perfluoroelastomer) Selection Guide

FFKM o-rings are the highest high-performance family of o-rings with the highest temperature (up to 620F) and ultimate chemical resistance. FFKM o-rings are specifically manufactured for extreme applications where up time performance is worth the significantly higher cost compared to other basic materials. Marco Rubber's high-volume allows substantial savings on FFKM o-rings from the various FFKM brands like Kalrez ® and Chemraz® best value Markez® o-rings, for high-performance FFKM o-rings without the high-performance price tag.

Kalrez®

Kalrez® o-rings are resistant to over 1,800 different harsh chemicals while retaining superior stability at high temperatures. As the world’s largest Kalrez® and FFKM o-ring inventory network, Marco Rubber stocks a wide range of Kalrez® FFKM o-ring material.

Markez®

Markez® o-rings provide unrivaled value in harsh applications – made with nearly identical ingredients as the highest priced brands. Designed to be a low-cost Kalrez® alternative with comparable performance for specific applications, Markez® o-rings may lead to substantial savings if your application is a good fit.

Chemraz®

Chemraz® o-rings have high heat, chemical and solvent resistance like many FFKM o-rings. It’s defining properties, however, are exceptional resistance to steam and performance in low-temperature environments, as well as availability

Parofluor®

Marco Rubber carries Parofluor® o-rings from Parker Seals which may offer great value for your application. Parofluor® o-rings are specially formulated for dozens of different environments and feature high temperature and chemical resistance.

Simriz®

Simriz® o-rings from Marco Rubber excel in aggressive environments like dry process chemistries and reactive plasmas. Like most FFKM o-rings, Simriz® o-rings offer excellent heat resistance, but many Simriz® materials also provide great low temperature performance and amine resistance too.


FFKM Compatibility and Order Online FFKM O-rings In Stock Extreme Chemical and Temperature Resistance

Compound Number
Brand
Color
Durometer (Shore A)
Relative Price
Typical Inventory Level
Typical MFG Time
Custom Size
O-Ring Tools
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
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Z1028 Markez® Black 75 O-Ring PricesO-Ring Prices 2-4 Weeks Free 610 (320ºC) 5 (-15ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
Best value general purpose performance, higher temperature resistance, wide chemical compatibility, compare to Kalrez® 6375 and Kalrez® 4079
Z1026 Markez® Black 75 O-Ring PricesO-Ring Prices 3-4 Weeks Free 480 (250ºC) 5 (-15ºC) O-Ring PricesO-Ring PricesO-Ring Prices
General purpose, good resistance to most paint solvents use in spraying applications, compare to Kalrez® 6375
Z1404 Markez® Black 75 O-Ring PricesO-Ring Prices 2-4 Weeks O-Ring Prices 500 (260ºC) -5 (-20ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
General purpose, good in most acids, solvents and a wide range of chemicals, steam resistance, compare to Kalrez® 6375
Z1210 Markez® Black 80 O-Ring PricesO-Ring Prices 6-8 Weeks O-Ring Prices 525 (275ºC) 20 (-5ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
General purpose, improved acid resistance, solvents and a wide range of chemicals, steam resistance, compare to Kalrez® 6375
SZ485 Simriz® Black 75 O-Ring PricesO-Ring Prices 6-8 Weeks O-Ring Prices 450 (230ºC) 20 (-5ºC) O-Ring Prices
General purpose, not for use with steam or strong acids, compare to Markez® Z1028, Z1026 and Z1026
Z1352 Markez® Black 75 O-Ring PricesO-Ring Prices 3-4 Weeks Free 500 (260ºC) 5 (-15ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
Improved hot amine resistance, compare to Kalrez® 6380 and Kalrez® 1050LF
Z1401 Markez® Black 80 O-Ring PricesO-Ring Prices 4-5 Weeks Free 620 (325ºC) -20 (-30ºC) O-Ring PricesO-Ring Prices
Wider temperature resistance range, general purpose high temp material, compare to Chemraz® 615 and Kalrez® 4079
Z1029 Markez® White 75 O-Ring PricesO-Ring Prices 2-4 Weeks Free 575 (300ºC) 5 (-15ºC) O-Ring PricesO-Ring PricesO-Ring Prices
General purpose white, good resistance to oxidation and high temperature exposure, compare to Kalrez® 8575 (300ºC), Chemraz® 513 and Kalrez® 2037
C505 Chemraz® Black 75 O-Ring PricesO-Ring Prices 4-6 Weeks O-Ring Prices 450 (230ºC) -20 (-30ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
General purpose, not for use with steam or strong acids, compare to Markez® Z1028, Z1026 and Z1026
C605 Chemraz® Black 80 O-Ring PricesO-Ring Prices 4-6 Weeks O-Ring Prices 500 (260ºC) -5 (-20ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
General purpose, compare to Markez® Z1028
Z1319 Markez® Black 75 O-Ring PricesO-Ring Prices 3-4 Weeks Free 620 (325ºC) 5 (-15ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
Higher temperature resistance, excellent steam resistance, low compression set, low permeability and very low outgassing. Compare to Kalrez® 4079 and 7075
Z1321 Markez® Black 75 O-Ring PricesO-Ring Prices 3-4 Weeks Free 480 (250ºC) -50 (-45ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
Improved low temperature resistance for use in oilfield and gas exploration, wide chemical resistance compare to Kalrez® 0040
K6375 Kalrez® Black 75 O-Ring PricesO-Ring Prices 6-8 Weeks O-Ring Prices 525 (275ºC) -5 (-20ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
General purpose, compare to Markez® Z1028
C615 Chemraz® Black 80 O-Ring PricesO-Ring Prices 4-6 Weeks O-Ring Prices 620 (325ºC) 0 (-18ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
Higher temperature resistance general purpose,not for use with steam, compare to Markez® Z1028, Z1401, Z1319 and Z1213
K7075 Kalrez® Black 75 O-Ring PricesO-Ring Prices 6-8 Weeks O-Ring Prices 620 (325ºC) 20 (-5ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
Higher temperature resistance general purpose, compare to Markez® Z1028, Z1401, Z1319 and Z1214
K4079 Kalrez® Black 75 O-Ring PricesO-Ring Prices 6-8 Weeks O-Ring Prices 600 (315ºC) 20 (-5ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
Higher temperature resistance, not for use with steam, compare to Markez® Z1028, Z1401, Z1319 and Z1213
Z1409 Markez® Black 75 O-Ring PricesO-Ring Prices 4-5 Weeks Free 450 (230ºC) 5 (-15ºC) O-Ring PricesO-Ring PricesO-Ring Prices
FDA compliant for food and life science application, good in steam, acids and wide chemical compatibility. compare to Kalrez® 6230
Z1204 Markez® Black 75 O-Ring PricesO-Ring Prices 6-8 Weeks O-Ring Prices 450 (230ºC) 20 (-5ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
USP Class IV approved and FDA compliant black, good for general purpose food and Medical applications. compare to Kalrez® 6230
Z1305 Markez® White 80 O-Ring PricesO-Ring Prices 3-4 Weeks Free 590 (310ºC) 5 (-15ºC) O-Ring PricesO-Ring PricesO-Ring Prices
USP Class VI, FDA & 3-A compliant, high temperature white material providing the best all around compatibility, compare to Kalrez® 6221 and Chemraz® 625
Z1203 Markez® Black 90 O-Ring PricesO-Ring Prices 6-8 Weeks O-Ring Prices 465 (240ºC) 20 (-5ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
Higher durometer general purpose, provides the lowest cost for larger size seals used in oilfield and gas exploration, compare to Kalrez® 3018 and Chemraz® 510
Z1317 Markez® Black 90 O-Ring PricesO-Ring Prices 3-4 Weeks Free 500 (260ºC) 5 (-15ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
Higher performance AED explosive decompression resistance, tested to Norsok & Nace TM0297 standard, resistance to methanol, sour gas and steam, compare to Kalrez® 0090
Z1412 Markez® Black 90 O-Ring PricesO-Ring Prices 3-4 Weeks Free 590 (310ºC) 5 (-15ºC) O-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring PricesO-Ring Prices
Higher temperature resistance Norsok M710 AED explosive decompression resistance, excellent resistance to Sour gas and associated chemicals and steam, compare to Kalrez® 7090
Z1322 Markez® Black 90 O-Ring PricesO-Ring Prices 3-4 Weeks Free 465 (240ºC) -50 (-45ºC) O-Ring PricesO-Ring PricesO-Ring PricesRed Square Mark IconO-Ring PricesO-Ring Prices
Lower temperature resistance, AED explosive decompression resistance, providing the best overall temp range and Chemical resistance, compare to Kalrez® 0040
C526 Chemraz® Black 95 o-ring priceo-ring price 4-5 Weeks o-ring price 480 (250ºC) -5 (-20ºC) o-ring priceo-ring priceo-ring price
Explosive decompression, compare to Markez® Z1322
Z1206 Markez® White 75 o-ring priceo-ring price 6-8 Weeks o-ring price 450 (230ºC) 20 (-5ºC) o-ring priceo-ring prico-ring priceo-ring priceo-ring price
General purpose semiconductor manufacturing applications, provides better compliance, compare to Chemraz® 513 and Kalrez® 2037
Z1216 Markez® White 75 O-Ring PricesO-Ring Prices 6-8 Weeks O-Ring Prices 620 (325ºC) 20 (-5ºC) O-Ring PricesO-Ring PricesO-Ring Prices
Improved plasma resistance higher purity higher temperature resistance, very low compression set over time. compare to Kalrez® 9100, 9500 and Chemraz® DXZ
Z1403 Markez® White 75 request a quoteO-rings quote price 3-4 Weeks Free 600 (315ºC) -20 (-30ºC) O-Ring PricesO-Ring PricesO-Ring Prices
Improved plasma resistance, higher purity, wider temperature range, low extractables, compare to Kalrez® 8575
Z1307 Markez® Clear Amber 75 O-Ring PricesO-Ring Prices 4-6 Weeks Free 525 (275ºC) 5 (-15ºC) O-Ring PricesO-Ring PricesO-Ring Prices
Higher purity amber tinted clear, semiconductor and laser grade material, excellent plasma resistance, compare to Kalrez® 9100
Z1411 Markez® Clear Amber 62 O-Ring PricesO-Ring Prices 4-6 Weeks O-Ring Prices 535 (280ºC) 5 (-15ºC) O-Ring PricesO-Ring PricesO-Ring Prices
Higher purity amber tinted clear, same as Markez® Z1407 but lower durometer for lower compression force for delicate applications, compare to Kalrez® 8002
K8575 Kalrez® White 62 O-Ring PricesO-Ring Prices 6-8 Weeks O-Ring Prices 575 (300ºC) 20 (-5ºC) O-Ring PricesO-Ring Prices
High temperature semiconductor processing, compare to Markez® Z1216, Z1403
K9100 Kalrez® White 74 O-Ring PricesO-Ring Prices 6-8 Weeks O-Ring Prices 575 (300ºC) 20 (-5ºC) O-Ring PricesO-Ring PricesO-Ring Prices
Higher purity translucent white, compare to Markez® Z1216, Z1307

Parker Parofluor® FFKM O-Ring Materials

Compound MATERIAL FAMILY DUROMETER Color LOW TEMP (F) HIGH TEMP (F) (DRY HEAT) HIGHLIGHT FEATURES
FFKM 75 BLACK 5 525 ACID RESISTANT
FFKM 75 BLACK 5 608 LOW COMPRESSION SET, AMS 7257, FDA
FFKM 90 BLACK 5 608 EXTRUSION RESISTANT, LOW COMPRESSION SET
FFKM 75 WHITE 5 600 PLASMA, HIGH PURITY, FDA USP CLASS VI
FFKM 75 WHITE 5 600 GENERAL PURPOSE, CLEAN
FFKM 65 WHITE 5 600 LOW CLOSURE FORCE
FFKM 75 BLACK 5 608 THERMAL ETCH, PLASMA, LOW EXTRACTABLES, AND LOW PARTICLE GENERATION
FFKM 60 PURPLE 5 600 LOW PARTICLE GENERATION AND LOW EXTRACTABLE LEVELS
FFKM 80 PURPLE 5 600 MINIMAL PARTICLE GENERATION AND LOW EXTRACTABLE LEVELS
FFKM 80 BLACK -40 527 Low Temperature and RGD Resistant
FFKM 75 BLACK 5 525 BROAD CHEMICAL RESISTANCE, FDA
FFKM 75 BLACK 5 527 EXCELLENT STEAM AND BASE RESISTANCE, BROAD CHEMICAL RESISTANCE
FFKM 65 WHITE 5 572 PLASMA, LOW CLOSURE FORCE
FFKM 75 BLACK 5 572 AMS 7257, HIGH TEMPERATURE, FDA
FFKM 75 WHITE 5 572 LOW LEACHABLES, FDA
FFKM 90 WHITE 5 572 PLASMA, LOW OUTGASSING
FFKM 90 BLACK 5 572 CHEMICALLY RESISTANT, EXTRUSION & ED RESISTANT

Simriz® FFKM O-Ring Materials

Simriz® Cpd#
Color
Hardness
Shore A
Upper Service
Temperature
Tensile Mpa (Psi)
Elongation %
Modulus @ 100%
MPa (psi)
Comp Set
70Hr @ 200°C
Temperature
Retraction 10%
SZ481 Black 71 230°C (446°F) 17.1 (2,480) 260 3.7 (535) 27 -14 °C
SZ481 is a 70-durometer, black, low-compression set, high-strength perfluoroelastomer.   The operating temperature range is from -10ºC to 230ºC (-14ºF to 446ºF).   Typical application environments are aggressive acids, bases and solvents.   Z1001 is also suited for many non-oxidizing dry process chemistries.    Z1001 can be used in place of Kalrez® compound 6375 when temperature are below 230ºC.
SZ484 Black 76 230°C (446°F) 22.1 (3205) 165 8.0 (1160) 34 6 °C
SZ484 is a FDA compliant, 75-durometer, black, low-compression set, high-strength perfluoroelastomer. The operating temperature range is from -10ºC to 230ºC (-14ºF to 446ºF). Typical application environments are aggressive acids and bases.
SZ485 Black 76 230°C (446°F) 18.5 (2680) 195 5.7 (825) 25 5 °C
SZ485 is a 75-durometer, black, low-compression set, high-strength perfluoroelastomer. The operating temperature range is from -10ºC to 230ºC (-14ºF to 446ºF). Typical application environments are aggressive acids, bases, solvents, and steam. Z1005 is also suited for many non-oxidizing dry process chemistries. Z1005 can be used in place of Kalrez® compound 6375 when temperature are below 230ºC.
SZ486 White 78 230°C (446°F) 18.0 (2610) 190 8.5 (1230) 25 5 °C
SZ486 is A 80 -durometer, white low-compression set, high strength perfluoroelastomer. The operating temperature range is from -10C to 230C (-14F to 446F). Typical application environments for Z1006 seals are aggressive dry process chemistries, including reactive plasmas.
SZ487 Black 79 310°C (615°F) 18.7 (2710) 170 8.6 (1245) 26 0 °C
SZ487 is a 75-durometer, black, high temperature perfluoroelastomer. The operating temperature range is from -10ºC to 310ºC (-14ºF to 615ºF). Typical application environments are aggressive acids, bases and solvents. Z1007 can be used in place of Kalrez® compound 4079. Used in dry, high heat below 310C.
SZ488 Ivory 73 300°C (572°F) 17.0 (2,465) 190 5.7 (825) 27 0 °C
SZ488 is a 70-durometer, ivory, high temperature perfluoroelastomer. The operating temperature range is from -10ºC to 300ºC (-14ºF to 572ºF). Typical application environments for Z1008 seals are aggressive dry process chemistries, including reactive plasmas.
SZ489 Clear 69 260°C (500°F) 13.5 (1960) 235 2.7 (390) 20 0 °C
SZ489 is a 65-durometer, clear, clean perfluoroelastomer. The operating temperature range is from -10C to 260C (-14F to 500F). Typical application environments for Z1009 seals are aggressive dry process chemistries, including reactive plasmas, as well as aggressive acids, bases and solvents.
SZ134 Black 89 230°C (446°F) 21.5 (3117) 160 16.6 (2407) 25 -4 °C
Z7257 Black 77

Properties Per SAE AMS 7257


Chemraz® FFKM O-Rings Compounds

Compound
Designator
Hardness
(Shore A)
Compound Color
Temperature
Range (ºF)
Tensile Strength
(PSI)
Modulus @ 50%
(PSI)
Modulus @ 100%
(PSI)
Elongation %
Compression Set
(70 hours at 400ºF)
505 75 Black -20 to 425 1750 450 1150 140 25
A field proven universal compound having a broader range of chemical resistance than any other single compound on the market. Chemraz 505 is the elastomer of choice used to seal better than 90% of the most demanding services found in the chemical process and refining industries.
615 80 Black 0 to 615 1830 360 1090 135 16
The highest temperature perfluoroelastomer on the market. Chemraz 615 can handle continuous operating temperatures up to 615ºF with outstanding resistance to fatal thermal related compression set.
605 80 Black 0 to 500 2150 420 1310 130 20
A high temperature compound with superior physical properties and chemical resistance comparable to Chemraz 505. This compound excels in demanding dynamic applications and exhibits unparalleled performance in high temperature steam and water.  Chemraz 605: Recently received USP Class VI Certification
526 95 Black 0 to 500 2580 100 30
This specialty black compound was formulated for incredible resistance to explosive decompression damage common in high pressure gas services. Chemraz 526 is also used in monomer services where polymerization attacks and ruptures common elastomeric seals.
584 70 Cream -22 to 428 1300 350 780 145 35
This specialty cream Chermaz compounds are formulated to withstand the most demanding chemical process applications. Chemraz 584 and 585 are the elastomers of choice for strong oxidation fluids and hot aqueous solutions.
585 80 Cream -22 to 428 1550 625 1240 130 35
This specialty cream Chermaz compounds are formulated to withstand the most demanding chemical process applications. Chemraz 584 and 585 are the elastomers of choice for strong oxidatio and hot aqueous fluids.
514 70 White -20 to 425 1460 300 680 190 25
The white industrial compounds are for applications where contamination from carbon black must be prevented.
Not for use in acids, aldehides, ethylene oxide, or propylene oxide.
517 80 White -20 to 425 1600 540 1050 165 25
The white industrial compounds are for applications where contamination from carbon black must be prevented.
Not for use in acids, aldehides, ethylene oxide, or propylene oxide.

Kalrez® FFKM O-Rings Typical Physical Properties*

KALREZ® COMPOUND
MAXIMUM APPLICATION
TEMP, °C (°F)
DUROMETER HARDNESS,
SHORE A, POINTS ±5
( ASTM D2240 )
100% MODULUS, MPA / PSI
( ASTM D412, 500 MM/MM (20IN/MM) )
TENSILE STRENGTH AT BREAK, MPA / PSI
( ASTM D412, 500 MM/MM (20IN/MM) )
ELONGATION AT BREAK, %
( ASTM D412, 500 MM/MM (20IN/MM) )
COMPRESSION SET, % AT 70 HRS AT 204ºC (400ºF)
(ASTM D395B, PELLETS)
TR-10, ºC / ºF
(ASTM 1329)
KALREZ® 6375 275 (527) 75 7.24 / 1050 15.16 / 2200 16025-3 (26.6)
A carbon black-filled product for general use in O-rings, seals, diaphragms and other parts specifically for the chemical process industry. This product has excellent broad chemical resistance, good mechanical properties, and outstanding hot-air aging properties. Kalrez® Spectrum™ 6375 is well suited for use in mixed process streams because of its excellent resistance to acids, bases, and amines. It is also recommended for use in hot water, steam, pure ethylene oxide and propylene oxide.
KALREZ® 7075 327 (620) 75 7.58 / 1100 17.91 / 2600 16012 -4 (24.8)
Enhanced physical properties including very low compression set and improved seal force retention. It is a carbon black-filled product utilizing proprietary cure chemistry. Its mechanical properties are designed for improved sealing performance in both high temperature environments and temperature cycling situations. Kalrez® Spectrum™ 7075 O-rings have a glossy finish. This product was specifically developed for the chemical and hydrocarbon industries to provide improved chemical and thermal resistance better than the industry standard set by Kalrez® 4079.
KALREZ® 4079 316 (600) 75 7.24 / 1050 16.88 / 2450 15025 -2 (28.4)
A low compression set product for general-purpose use in O-rings, diaphragms, seals, and other parts used in the process and aircraft industries. It is a carbon black-filled product with excellent chemical resistance, good mechanical properties, and outstanding hot air aging properties. It exhibits low swell in organic and inorganic acids and has good response to temperature cycling effects. This product is not recommended for use in hot water/steam applications or in contact with certain hot aliphatic amines, ethylene oxide, or propylene oxide.
KALREZ® 6380 225 (437) 80 6.89 / 1000 15.86 / 2300 16038 -5 (23.0)
A non-black product specifically developed for chemical processes involving hot, aggressive amines. It has also been successfully used in applications involving highly oxidizing chemicals. In addition, it has excellent overall chemical resistance. This cream colored product is easily identifiable when selecting an O-ring material for harsh chemical plant services.
KALREZ® 7090 325 (617) 90 15.51 / 2250 22.75 / 3300 7512 -5 (23.0)
A product for uses requiring higher hardness/higher modulus than more typical applications. Kalrez® Spectrum™ 7090 perfluoroelastomer parts are well suited for both static and dynamic applications as well as specific sealing applications requiring extrusion resistance at high temperatures. These specialty black parts have excellent thermal and mechanical properties, including excellent compression set and seal force retention, resistance to temperature cycling effects, and rapid gas decompression (RGD). Short excursions to higher temperatures may also be possible.
KALREZ® 0090 250 (482) 95 14.20 / 2060 19.51 / 2830 8040 -7 (-19.4)
A black product with broad chemical resistance combined with high modulus and high hardness. Kalrez® 0090 parts have outstanding resistance to extrusion and rapid gas decompression (RGD). This product has been independently tested and certified by the Materials Engineering Research Laboratory (MERL – UK) to meet NORSOK-M-710 Rev 2 requirements.
KALREZ® 0040 220 (428) 70 6.61 / 960 13.72 / 1990 18038 -17 (1.4)
A black product specifically designed for low temperature environments where significant chemical resistance is required. Kalrez® Spectrum™ 0040 parts maintain elasticity and seal force at temperatures unattainable by other perfluoroelastomers.
KALREZ® 1050LF 288 (550) 82 12.40 / 1080 18.60 / 2700 12535 -4 (24.8)
A carbon black-filled product for O-rings, seals, and other parts used in chemical process industries. It has good hot water/steam, and excellent amine resistance. Kalrez® 1050LF is not recommended for use in organic acids, or inorganic acids at high temperatures.

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Don't see what you need? Please contact an FFKM o-ring application engineer for assistance in selecting the compound that provides the best combination of performance and price for your specific application.