Viton™ Type GF (High Fluorine, Improved Base Resistance Fluorocarbon Elastomer)
Viton™ Type GF is a high-fluorine fluorocarbon elastomer developed to provide enhanced resistance to aggressive fuels, oils, and selected base-containing environments compared to standard FKM materials. By modifying polymer chemistry and fluorine content, Viton™ Type GF O-rings, gaskets, and custom molded parts offer broader chemical compatibility than Viton™ Type A and Type B, while maintaining reliable mechanical performance.
Viton™ Type GF O-rings, gaskets, and custom molded parts are commonly specified in applications where exposure to fuel additives, lubricants, and mildly basic fluids exceeds the capability of standard fluorocarbon compounds. While not intended for highly alkaline or amine-rich environments handled by specialty materials such as Viton™ ETP, Type GF provides an important performance step between conventional FKM grades and extreme chemical resistance formulations.
The engineers and consultants at Canyon Components work closely with customers to determine when Viton™ Type GF offers the optimal balance of chemical resistance, temperature capability, and cost. Contact our expert staff for assistance selecting the right Viton™ Type GF compound for your sealing application.
Common names include: FKM (Fluorocarbon), High Fluorine FKM
Trade names include: Viton™, Fluorel®, Technoflon®, Dai-El®
Features of Viton™ Type GF
- Viton™ Type GF O-rings, gaskets, and custom molded parts provide improved resistance to fuels and lubricants compared to Viton™ Type A and Type B
- Viton™ Type GF O-rings, gaskets, and custom molded parts exhibit enhanced resistance to selected bases and fuel additives
- Viton™ Type GF O-rings, gaskets, and custom molded parts maintain good mechanical strength and abrasion resistance
- Viton™ Type GF O-rings, gaskets, and custom molded parts offer excellent resistance to ozone, weathering, and aging
- Viton™ Type GF O-rings, gaskets, and custom molded parts have low gas permeability
- Viton™ Type GF O-rings, gaskets, and custom molded parts are available in multiple compounds to balance chemical resistance, temperature performance, and cost
Limitations of Viton™ Type GF
- Viton™ Type GF O-rings, gaskets, and custom molded parts have poor resistance to hot water and superheated steam
- Viton™ Type GF O-rings, gaskets, and custom molded parts are not recommended for strong amines, ketones, or highly polar solvents
- Viton™ Type GF O-rings, gaskets, and custom molded parts are not compatible with ammonia gas or strong inorganic bases
- Viton™ Type GF O-rings, gaskets, and custom molded parts typically have a service temperature range of -15°F to 437°F (-26°C to 225°C), depending on compound and application
Please consult a Canyon Components Engineer about your specific application and we will use our decades of experience to formulate a solution that fits your need.
FKM & Viton™ High Performance Polymer Types
There are many types of FKM Polymer Types that Canyon Components offers.
This includes FKM Types A, B, F, GLT, GFLT, XLT, ULT, ETP, & TBR.
The table below is a Viton™ selection guide that lays out the pluses and minuses of each variation.
Key: 1 = Excellent 2 = Good 3 = Poor 4 = Not Recommended
| Types of FKM | A | GF | GLT | GLT ED | GFLT | XLT | ETP | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Canyon Compound Number | VT75BK00 | VT75BK20 | VT75BK30 | VT90BK31 | VT75BK40 | VT75BK50 | VT75BK60 | |||||||
| Description | General Purpose | General Purpose High Fluorine |
Low Temp | Low Temp Resistant to Explosive Decompression |
Low Temp High Fluorine |
Extreme Low Temp High Fluorine |
Viton® Extreme High Fluorine FEPM |
|||||||
| Cure Type | Bisphenol | Peroxide | Peroxide | Peroxide | Peroxide | Peroxide | Peroxide | |||||||
| Typical Fluorine Content | 66 | 69.5 | 64 | 64 | 66.5 | 66.5 | 67 | |||||||
| Typical High Temp Range °F (°C) | 437 (225) | 437 (225) | 437 (225) | 437 (225) | 437 (225) | 437 (225) | 437 (225) | |||||||
| Typical Low Temp Range °F (°C) | -15 (-26) | -15 (-26) | -40 (-40) | -40 (-40) | -35 (-37) | -54 (-48) | -6 (-21) | |||||||
| TR-10 °F (°C) | 1 (-17) | -6 (-21) | -22 (-30) | -22 (-30) | -11 (-24) | -40 (-40) | 12 (-11) | |||||||
| Oxygenated Automotive Fuels (containing MeOH, EtOH, MTBE, etc.) | 4 | 1 | 4 | 4 | 1 | 1 | 1 | |||||||
| Reciprocating Engine Lubricating Oils (SE-SF Grades) | 2 | 1 | 1 | 1 | 1 | 1 | 1 | |||||||
| Aliphatic Hydrocarbon Process Fluids,Chemicals | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||||||
| Aromatic Hydrocarbon Process Fluids, | 1 | 1 | 2 | 2 | 1 | 1 | 1 | |||||||
| Aqueous Fluids: Water, Steam, Mineral Acids (H2SO4, HNO3, HCl, etc.) | 3 | 1 | 1 | 1 | 1 | 1 | 1 | |||||||
| Amines, High pH Caustics | 4 | 4 | 4 | 4 | 4 | 4 | 1 |
FKM Type GF (Viton™ Type GF) Materials Available
This table shows many of our standard materials and links out to our O-ring store. Get in touch with us if you need a custom gasket, custom molded part, or non-standard geometry!
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Industrial Usage of Viton™ Type GF
Viton™ Type GF is selected for sealing applications requiring broader chemical resistance than standard FKM grades, particularly in systems exposed to complex fuel formulations and lubricants containing additives. It provides a reliable solution where Type A or Type B compounds approach their performance limits but where extreme specialty FKMs are not required.
Canyon Components partners with customers to ensure Viton™ Type GF is specified correctly, delivering dependable sealing performance while maintaining cost efficiency.
Automotive Industry
Viton™ Type GF used in fuel system O-rings, gaskets, and seals exposed to modern fuels, additives, and lubricants.
Oil and Gas Industry
Viton™ Type GF applied in seals and gaskets for valves, pumps, and fittings handling hydrocarbon fluids and chemically complex lubricants.
Chemical Processing
Viton™ Type GF used in sealing components exposed to fuels, oils, and selected mildly basic fluids.
Aerospace Industry
Viton™ Type GF selected for fuel and lubricant sealing applications requiring enhanced chemical resistance and long-term durability.
Industrial Equipment
Viton™ Type GF common in compressors, pumps, and fluid-handling systems where resistance to aggressive oils and additives is required.
Please consult a Canyon Components Engineer about your specific application and we will use our decades of experience to formulate a solution that fits your need.
All Other FKM (Viton™) Types Available
Viton™ Type A – General Purpose FKM
Viton™ Type A FKM O-rings, gaskets, and custom molded parts provide balanced heat and chemical resistance. This general purpose fluorocarbon elastomer is widely used in industrial sealing applications involving fuels, oils, and hydrocarbons.
Viton™ Type B – Improved Chemical Resistance FKM
Viton™ Type B FKM offers enhanced resistance to aggressive fuels, aromatics, and chemical blends compared to Type A. This high-fluorine fluorocarbon elastomer is commonly specified in demanding fuel systems.
Viton™ Type F – Improved Chemical Resistance FKM
Viton™ Type F FKM provides superior resistance to oxygenated fuels, solvents, and aggressive chemical environments. This fluorocarbon elastomer is frequently used in automotive and industrial fuel sealing applications.
Viton™ Type GLT – Low Temperature FKM
Viton™ Type GLT FKM delivers improved low-temperature flexibility compared to standard fluorocarbon elastomers, supporting sealing performance in colder climates without sacrificing chemical resistance.
Viton™ Type GFLT – Low Temperature and Chemical Resistant FKM
Viton™ Type GFLT FKM combines enhanced low-temperature flexibility with improved resistance to aggressive fuels and chemical blends, making it suitable for demanding fluorocarbon sealing applications.
Viton™ Type ETP – Specialty Chemical Resistant FKM
Viton™ Type ETP FKM provides exceptional resistance to aggressive chemicals, steam, and amines. This specialty fluorocarbon elastomer is often used in oil, gas, and chemical processing systems.
Viton™ Type ULT – Ultra Low Temperature FKM
Viton™ Type ULT FKM is engineered for ultra-low temperature environments while maintaining fluorocarbon chemical resistance, making it suitable for extreme cold industrial and aerospace sealing systems.
Viton™ Type XLT – Extreme Low Temperature FKM
Viton™ Type XLT FKM extends low-temperature sealing capability beyond GLT grades, offering reliable fluorocarbon elastomer performance in severe cold and aerospace environments.
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