Viton™ Type GFLT (Low Temperature, High Fluorine Fluorocarbon Elastomer)
Viton™ Type GFLT is a specialty fluorocarbon elastomer engineered to combine excellent low-temperature flexibility with enhanced chemical and fuel resistance. By blending the low-temperature performance characteristics of Viton™ GLT with a higher fluorine content, Viton™ Type GFLT O-rings, gaskets, and custom molded parts deliver reliable sealing in environments that experience cold starts, wide temperature swings, and aggressive fuel exposure.
Viton™ Type GFLT O-rings, gaskets, and custom molded parts are commonly specified in applications where standard FKM materials harden at low temperatures or swell excessively in modern fuel blends. This unique balance of properties makes Viton™ GFLT a preferred material for automotive, aerospace, oil and gas, and industrial systems operating in cold climates or temperature-variable conditions.
The engineers and consultants at Canyon Components take pride in guiding customers toward the most effective sealing solution. Contact our expert staff for assistance selecting the right Viton™ Type GFLT compound for your O-rings, gaskets, or custom molded parts.
Common names include: FKM (Fluorocarbon), Low Temperature High Fluorine FKM
Trade names include: Viton™ GFLT, Fluorel®, Technoflon®, Dai-El®
Features of Viton™ Type GFLT
- Viton™ Type GFLT O-rings, gaskets, and custom molded parts provide excellent low-temperature flexibility while maintaining strong chemical resistance
- Viton™ Type GFLT O-rings, gaskets, and custom molded parts remain flexible at temperatures as low as -35°F to 437°F (-37°C to 225°C) depending on compound
- Viton™ Type GFLT O-rings, gaskets, and custom molded parts offer improved resistance to fuels, oils, lubricants, and aggressive fuel additives compared to standard FKM
- Viton™ Type GFLT O-rings, gaskets, and custom molded parts exhibit low compression set across a wide temperature range
- Viton™ Type GFLT O-rings, gaskets, and custom molded parts have excellent resistance to ozone, weathering, and aging
- Viton™ Type GFLT O-rings, gaskets, and custom molded parts are available in multiple formulations to balance low-temperature performance, chemical resistance, and cost
Limitations of Viton™ Type GFLT
- Viton™ Type GFLT O-rings, gaskets, and custom molded parts have poor resistance to hot water and superheated steam
- Viton™ Type GFLT O-rings, gaskets, and custom molded parts are not recommended for strong amines, ketones, or highly polar solvents
- Viton™ Type GFLT O-rings, gaskets, and custom molded parts are not compatible with ammonia gas or strong inorganic bases
- Viton™ Type GFLT O-rings, gaskets, and custom molded parts typically have a service temperature range of -35°F to 437°F (-37°C to 225°C), depending on compound and application. Other FKM blends have better low temperature performance, and FFKM materials typically have better high temperature performance.
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 GFLT (Viton™ Type GFLT) 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 GFLT
Viton™ Type GFLT is widely used in sealing applications that demand both cold-temperature sealing reliability and enhanced fuel resistance. It is particularly valuable in systems exposed to modern fuel formulations, aggressive additives, and repeated thermal cycling.
Canyon Components works closely with customers to ensure Viton™ Type GFLT is specified correctly, maximizing seal life and system reliability in demanding environments.
Automotive Industry
Viton™ Type GFLT is used in fuel system O-rings, gaskets, and seals for vehicles operating in cold climates, including fuel injectors, pumps, and emission control systems.
Oil and Gas Industry
Viton™ Type GFLT is applied in seals and gaskets for surface equipment exposed to temperature cycling, hydrocarbons, and cold ambient conditions.
Aerospace Industry
Viton™ Type GFLT is selected for sealing applications requiring flexibility at low temperatures during high-altitude operation and ground-level chemical exposure.
Industrial Equipment
Viton™ Type GFLT is common in compressors, pumps, and hydraulic systems that experience cold starts and exposure to fuels and oils.
Energy and Power Generation
Viton™ Type GFLT is utilized in sealing components for systems operating in variable climates where both low-temperature elasticity and chemical resistance are critical.
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 GF – High Fluorine FKM
Viton™ Type GF FKM features increased fluorine content for improved resistance to fuels, biodiesel, and harsh chemicals while maintaining strong mechanical properties and sealing reliability.
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 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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