Viton™ Type ULT (Ultra-Low Temperature Fluorocarbon Elastomer)
Viton™ Type ULT is an ultra-low temperature fluorocarbon elastomer engineered for sealing applications that must operate reliably in extreme cold environments while still maintaining the chemical resistance, mechanical strength, and heat stability expected of FKM materials. Viton™ Type ULT O-rings, gaskets, and custom molded parts are specifically formulated to remain flexible at temperatures well below the limits of standard FKM, GLT, and GFLT compounds.
Canyon Components’ VT90BK58 is an ultra-low temperature, 90 Shore A black terpolymer FKM Type ULT compound developed for high-performance O-rings and gaskets operating in severe cold conditions. This compound retains flexibility down to -61°C (-78°F) while delivering strong tensile strength and improved extrusion resistance for high-pressure sealing applications. VT90BK58 provides dependable performance in environments where conventional FKM compounds may harden, lose elasticity, or fail prematurely.
Viton™ Type ULT O-rings, gaskets, and custom molded parts are well suited for both static and dynamic sealing applications that demand a precise balance of ultra-low temperature elasticity, chemical stability, and long-term durability. Additional FKM types are available including A, B, F, GF, GLT, GFLT, ULT, and ETP to support a wide range of sealing requirements.
The engineers and consultants at Canyon Components take pride in helping customers select the optimal sealing solution for extreme environments. Contact our expert staff for assistance with Viton™ Type ULT O-rings, gaskets, or custom molded parts.
Common names include: FKM (Fluorocarbon), Ultra-Low Temperature FKM
Trade names include: Viton™, Fluorel®, Technoflon®, Dai-El®
Features of Viton™ Type ULT
- Viton™ Type ULT O-rings, gaskets, and custom molded parts provide exceptional flexibility at ultra-low temperatures
- Viton™ Type ULT O-rings, gaskets, and custom molded parts retain elasticity down to -61°C (-78°F) depending on compound
- Viton™ Type ULT O-rings, gaskets, and custom molded parts maintain strong tensile strength for improved extrusion resistance
- Viton™ Type ULT O-rings, gaskets, and custom molded parts offer excellent resistance to fuels, oils, and hydrocarbon-based fluids
- Viton™ Type ULT O-rings, gaskets, and custom molded parts exhibit low compression set in extreme cold service
- Viton™ Type ULT O-rings, gaskets, and custom molded parts are available in high-performance terpolymer formulations for demanding sealing environments
Limitations of Viton™ Type ULT
- Viton™ Type ULT O-rings, gaskets, and custom molded parts have reduced chemical resistance compared to high-fluorine FKM grades such as Type F, GF, or ETP
- Viton™ Type ULT O-rings, gaskets, and custom molded parts are not recommended for strong amines, ketones, or highly polar solvents
- Viton™ Type ULT O-rings, gaskets, and custom molded parts have poor resistance to hot water and superheated steam
- Viton™ Type ULT O-rings, gaskets, and custom molded parts typically have a service temperature range of -78°F to 437°F (-61°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 ULT (Viton™ Type ULT) 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 ULT
Viton™ Type ULT is selected for applications where extreme cold performance is non-negotiable, yet chemical resistance and pressure capability must still meet demanding industrial requirements. Its ability to remain flexible at ultra-low temperatures makes it critical in environments that exceed the cold-service limits of GLT and GFLT compounds.
Canyon Components works closely with customers to ensure Viton™ Type ULT is specified correctly, delivering reliable sealing performance and long service life in the harshest cold-temperature environments.
Oil and Gas Industry
Viton™ Type ULT is used in seals, O-rings, and gaskets for equipment operating in arctic or sub-arctic conditions where cold starts and pressure cycling are common.
Energy and Power Generation
Viton™ Type ULT is applied in sealing components for outdoor energy infrastructure exposed to extreme cold and fluctuating operating conditions.
Aerospace Industry
Viton™ Type ULT is selected for sealing applications requiring ultra-low temperature flexibility during high-altitude operation and cold-soak conditions.
Industrial Equipment
Viton™ Type ULT is used in compressors, pumps, and high-pressure systems that must maintain sealing integrity during severe cold starts.
Automotive Industry
Viton™ Type ULT is applied in fuel system and sealing components for vehicles and equipment operating in extreme cold climates.
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 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 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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