High Performance Viton O-Rings

Viton® is a synthetic, high-performance fluoropolymer elastomer (rubber) commonly used in o-rings for rigorous applications. Categorized under the ASTM D1418 and ISO 1629 designation of FKM (hence, why they’re also referred to as “FKM o-rings“), Viton O-Rings are preferred because of their high resistance to extreme heat and brutal atmospheric conditions, as well as to oxygen, mineral oil, fuels, hydraulic fluids, aromatics and many organic solvents and chemicals.

As a trusted Viton O-Ring supplier, in addition to the standard compounds, we can supply:

  • General Type (A-TYPE, 66% fluorine)
  • Middle-Fluorine Content Type (B-, GBL-TYPE, 67~68.5% fluorine)
  • High-Fluorine Content Type (F-, GF-TYPE,70% fluorine )
  • Improving Low-Temperature Flexibility Type (GLT-, GFLT)
  • Excellent Resistance to More Chemicals & Solvents– Viton® ETP Extreme.

Optimal Viton Temperature Ranges

  • For general-type seals, the optimal viton o-ring temperature range is between -15°F and 450°F in static applications, though it can withstand service temperatures up to 527°F for a short time.
  • Full operation at 450°F will shorten parts’ lifetime more than full operation at -15°F.
  • In dynamic applications, suitable temperature range is between -15°C and 200°C.
  • For GLT-type, the low temperature can reach as low as -40°C.


For general FKM O-Ring types, the hardness is from 50 to 90 Shore A. For others type 60 to 90 Shore A are appropriate.

Color Options

Color Options

Black, brown, green, white, rust, yellow and blue are available, in addition to any customer-assigned color.

Viton Seal Applications

Because Viton O-Rings have a high resistance to extreme heat (even flames), chemicals, oils, solvents, and weathering, they’re often used in the automotive, chemical processing, and aerospace industries — in addition to many others. Viton GLT has a more broad usable thermal range of -45° C to 275° C and outstanding in aggressive HTS-type oils, applied in aerospace applications. Viton ETP is usually applied in the chemical industrial field.

Recommended ApplicationsUnsuitable ApplicationsMechanical Properties
  • Fuel Seals
  • Quick-Connect O-Rings
  • Head & Intake Manifold Gaskets
  • Fuel Injection Seals
  • Advanced Fuel Hose Components
  • Vacuum
  • Most Acids & Chemicals
  • Halogenated Hydrocarbons
  • Di-ester Lubricants
  • Petroleum Oils & Fuels
  • Silicone Oils & Greases
Ketones (MEK)
Auto & Aircraft Brake Fluids
Amines (Ammonia)
Acetone, Skydrol, Ethyl Acetate
Hot Water & Steam (except specialty grades)
Low Molecular Esters & Ethers
Good Wear Resistance
Excellent Comp. Set Resistance
Moderate Short-Term Resilience
Excellent Permeation Resistance

Request a quote to place an order or contact us for more information.