Viton™ GLT (Low Temperature Fluorocarbon FKM GLT Elastomer)
Viton™ GLT is a specialty fluorocarbon elastomer engineered for applications requiring excellent low-temperature flexibility while maintaining the chemical resistance and high-temperature performance associated with traditional FKM materials. Viton™ GLT O-rings, gaskets, and custom molded parts are specifically formulated to remain flexible and seal effectively in cold environments where standard FKM compounds may harden or lose elasticity.
Viton™ GLT elastomers, O-rings, gaskets, and custom molded parts exhibit outstanding resistance to certain fuels, oils, lubricants, ozone, weathering, and a wide range of chemicals, while extending the usable low-temperature range well below conventional FKM limits. This balance of low-temperature performance and chemical resistance makes Viton™ GLT an excellent choice for demanding sealing applications in automotive, aerospace, oil and gas, and industrial systems exposed to cold start conditions or extreme temperature cycling.
The engineers and consultants at Canyon Components take pride in identifying the optimal sealing solution for every application. Contact our expert staff for assistance selecting the right Viton™ GLT compound for your O-rings, gaskets, or custom molded parts.
Along with Viton™ Type GLT, there are many other low temperature materials available.
Common names include: FKM (Fluorocarbon), Low Temperature FKM
Trade names include: Viton™ GLT, Fluorel®, Technoflon®, Dai-El®
Features of FKM (Viton™)
- Viton™ GLT O-rings, gaskets, and custom molded parts provide excellent low-temperature flexibility compared to standard FKM compounds
- Viton™ GLT O-rings, gaskets, and custom molded parts maintain sealing performance at temperatures down to -40°F (-40°C), or lower depending on compound
- Viton™ GLT O-rings, gaskets, and custom molded parts offer excellent resistance to fuels, oils, lubricants, and hydrocarbon-based fluids
- Viton™ GLT O-rings, gaskets, and custom molded parts exhibit good resistance to ozone, weathering, and aging
- Viton™ GLT O-rings, gaskets, and custom molded parts have lower compression set at low temperatures than standard FKM
- Viton™ GLT O-rings, gaskets, and custom molded parts are available in multiple formulations to balance low-temperature performance, chemical resistance, and cost
Limitations of Viton™ GLT
- Viton™ GLT O-rings, gaskets, and custom molded parts have poor resistance to hot water and superheated steam
- Viton™ GLT O-rings, gaskets, and custom molded parts are not recommended for amines, ketones, or polar solvents
- Viton™ GLT O-rings, gaskets, and custom molded parts are not compatible with ammonia gas or low molecular weight organic acids or Oxygenated Automotive Fuels.
- Viton™ GLT O-rings, gaskets, and custom molded parts typically have a maximum continuous service temperature of ~437°F (225°C), which is lower than some high-fluorine FKM grades
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 GLT (Viton™ GLT) 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™ GLT
Viton™ GLT is widely used in applications where cold-temperature sealing reliability is critical but chemical resistance cannot be sacrificed. While Viton™ GLT may not match the extreme chemical resistance of specialty FKMs such as Viton™ ETP, its superior low-temperature performance makes it indispensable in industries that experience cold starts, outdoor exposure, or wide temperature swings.
Canyon Components works closely with customers to ensure Viton™ GLT is applied correctly and economically, delivering reliable sealing performance even in the harshest environments.
Automotive Industry
Viton™ GLT is used in fuel system O-rings, gaskets, and seals that must remain flexible during cold starts, including fuel injectors, regulators, and fuel rail assemblies.
Oil and Gas Industry
Viton™ GLT is applied in seals and O-rings for surface and near-surface equipment exposed to cold climates, temperature cycling, and hydrocarbon fluids.
Aerospace Industry
Viton™ GLT is used in aircraft sealing applications where low-temperature performance is essential during high-altitude operation and cold-soak conditions.
Industrial Equipment
Viton™ GLT is common in pumps, compressors, and hydraulic systems that operate outdoors or in unheated environments while exposed to oils and fuels.
Energy and Power Generation
Viton™ GLT is utilized in sealing components for systems that experience wide ambient temperature ranges and require consistent sealing integrity over time.
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 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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