Viton® O-Rings - FKM Gaskets - Fluoroelastomer Seals
Order Viton ® O-Rings from the World’s Largest Viton ® O-Ring Inventory Network:
Viton ® o-rings from Marco Rubber offer excellent compatibility with a range of chemicals, oils and resist high temperatures up to 400F. Viton ® is also known as FKM made of fluoroelastomer one of the most versatile and widely used sealing materials.
Marco Rubber stocks all USA standard Viton ® O-Rings sizes, thousands of metric Viton ® O-Ring and non-standard sizes. When not in stock most custom Viton ® O-Rings can be made in a few weeks without tooling fees.
FKM and Viton ® material types for high temperature seals and chemical resistant gaskets include the following specific types: A, B, F, GLT, GFLT, XLT, ULT, ETP, TBR. View the chart below or contact our experts to learn which is best for your application.
|Recommended Use||Not Recommended For||Mechanical Properties|
| Vacuum |
Most Acids / Chemicals
Petroleum Oils / Fuels
Silicone Oils / Greases
| Ketones (MEK) |
Auto / Aircraft Brake Fluids
Acetone, Skydrol, Ethyl Acetate
Hot Water and Steam (except specialty grades)
Low Molecular Esters and Ethers
| Good Wear Resistance |
Excellent Comp. Set Resistance
Moderate Short-Term Resilience
Excellent Permeation Resistance
Order Viton® O-Rings from the world’s largest Viton® O-Rings inventory network.
FKM and Viton® Material Types: A, B, F, GLT, GFLT, XLT, ULT, ETP, TBR
High Temperature Viton® Seals and Chemical Resistant Viton® Gaskets.
FKM Type Comparison Chart
FKM Viton ® Type
Marco Commodity Compound number
High Temperature Performance F° (C°)
|437 (225)||437 (225)||437 (225)||437 (225)||437 (225)||437 (225)||437 (225)||437 (225)||437 (225)||450 (232)||450 (232)|
Low Temperature Performance F° (C°)
|-15 (-26)||-11 (-24)||1 (-17)||3 (-16)||-40 (-40)||-29 (-34)||-54 (-48)||-65 (-54)||-6 (-21)||25 (-4)||1 (-17)|
|TR-10 Low Temperature Flexibility F° (C°)||1 (-17)||7 (-14)||20 (-7)||21 (-6)||-22 (-30)||-11 (-24)||-40 (-40)||-49 (-45)||12 (-11)||37 (3)||20 (-7)|
|Strong Base, high pH, Caustic, Amines|
| Low Molecular Weight Carbonyls 100% |
concentration (MTBB, MBK, MIBK, etc.)
|Engine Lubricating Oil, SG and SH|
| Aqueous fluids, steam, mineral acids |
|Aromatic Hydrocarbons (toluene, etc.)|
| Automotive Fuels Oxygenated with |
MEOH, ETOH, MTBE, etc.
|Engine Lubricating Oil, SE and SF|
|Resistance to Compression Set|
|Automotive and Most Aviation Fuels|
|Rating Scale:||= Excellent||= Good||= Not Recommended|
FKM and Viton® O-Rings Material Compound Comparison:
Hundreds more specialty compounds available. Contact a Marco Sales Consultant or Engineer for more information.
|Marco Compound Number||Datasheet|| Hardness |
|Color|| Low Temp. |
| High Temp. |
|Scroll Down for More|
|75||Black||-15 (-26)||437 (225)||General purpose, low cost & high inventory FKM|
|75||Black||-15 (-26)||437 (225)||AMS-R-83248 M83248/1-### PER MIL-R-83248 TY-1 CL-1, available in a UL recognized grade, compare to Parker V0747-75|
|75||Brown||-15 (-26)||437 (225)||Brown FKM Viton, improved oxidation resistance, compare to Parker V884-75|
|90||Black||-15 (-26)||437 (225)||M83248/2-### PER MIL-R-83248C TY 1 CL 2, compare to Parker V0709-90|
|75||Black||-40 (-40)||437 (225)||M83485/1-XXX PER MIL-R-83485 GLT-type FKM Improved low temp resistance, compare to Parker VM835-75|
|90||Black||-15 (-26)||437 (225)||General purpose high durometer, good in high pressure and dynamic applications, compare to Parker VA153-90|
|50||Black||-15 (-26)||437 (225)||General purpose softer FKM, compare to Parker V0986-50|
|60||Black||-15 (-26)||437 (225)||General purpose softer FKM, compare to Parker V0769-60 and Parco 9009-60|
|75||White||-15 (-26)||437 (225)||White FKM, improved oxidation resistance, compare to Parker V1033-70|
|75||Black||-15 (-26)||437 (225)||Internally lubricated with PTFE, reduces surface friction and sticking, similar to Parker V0848-75|
|75||Black||-6 (-21)||437 (225)||Viton® ETP, base resistant , best chemically resistant FKM, compare to Parker V1260-75|
|75||Black||-29 (-34)||437 (225)||Viton GFLT® recommended for Oxygenated Automotive Fuels (containing MeOH, EtOH, MTBE, etc. and Aromatic Hydrocarbon Process Fluid Chemicals. Compare to Parker V7594B|
|75||Black||-40 (-40)||437 (225)||Viton GLT® Low temperature resistance, improved Water, Steam and Mineral Acids resistance|
|95||Black||-15 (-26)||437 (225)||Very hard extrusion resistant type A FKM, compare to Parker V1238-95 and Parco 9021-95|
|75||Black||-15 (-26)||437 (225)||FDA and 3A compliant|
|75||Black||3 (-16)||437 (225)||Viton® GF-S best value for widest chemical resistance FKM|
|90||Black||-40 (-40)||437 (225)||AED and extrusion resistant GLT type FKM|
|75||Black||-54 (-48)||437 (225)||Extended low temperature FKM, Wide chemical resistance including H2S and Oxygenated fuels, compare to Parker V1289-75|
|75||Black||+1 (-17)||437 (225)||Viton® F material for increased solvent and general chemical resistance|
|90||Black||-40 (-40)||437 (225)||AED resistant Viton GLT®, Norsok M710 and NACE TM0297 tested|
|70||White||-15 (-26)||437 (225)||USP class VI medical grade, USDA 3A and FDA compliant|
|70||Black||-15 (-26)||437 (225)||Metal detectable, FDA compliant type A FKM|
|90||Black||-50 (-46)||437 (225)||AED resistant, Norsok M710 and NACE T0297 tested Wide chemical resistance including H2S and Oxygenated fuels.|
|70||Black||-54 (-48)||437 (225)||Ultra-low temperature FKM commercial grade Wide chemical resistance including H2S and Oxygenated fuels.|
|60||Black||-40 (-40)||437 (225)||Terpolymer GLT type for low temperature applications|
|75||Brown||-15 (-26)||437 (225)||NSF51 compliant for food contact|
Sorry, no results found.
FKM and Viton® O-Rings Temperature Range:
The temperature ranges presented above 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.
FKM Trade Names:
Viton®, Fluorel®, Technoflon®, Dai-El®
FKM, FPM (Europe), Fluoropolymer, Fluoroelastomer
FKM and Viton® O-Rings Features:
- Outstanding heat stability
- Situational service life above 200°C
- Excellent resistance to acids, fuels, mineral and vegetable oils and greases, aliphatic, aromatic and chlorinated hydrocarbons, non-flammable hydraulic fluids (HFD) and many organic solvents and chemicals.
- Excellent resistance to aging and ozone.
- Low gas permeability, low compression set.
- Ketones (MEK,and Acetone) and Skydrol fluids.
- Amines and Anhydrous Ammonia.
- Low molecular weight esters and ethers. Hot hydrofluoric or chlorosulfonic acids and low molecular weight organic acids (formic and acetic acids).
- Polar solvents, low molecular weight organic solvents and glycol-based brake fluids
FKM and Viton® O-Rings Specialty Performance Polymer Types:
A, B, F, GLT, GFLT, XLT, ULT, ETP, TBR
FKM and Viton® O-Rings Compound and Product Options:
Not a complete list of offerings. Please contact a Marco Sales Consultant or Engineer to discuss additional options. See Popular Compounds list below for compound examples.
Fluoroelastomers are referred to generically as FKM polymers per the nomenclature noted in ASTM D1418. In the SAE J200 ASTM D2000 classification system for rubber materials Fluoroelastomers are documented as a “HK”.