Viton™ for the EMI and RFI Shielding Industry
Viton™ (FKM) fluorocarbon elastomers are used in the EMI (Electromagnetic Interference) and RFI (Radio Frequency Interference) shielding industry for manufacturing O-rings, gaskets, seals, and custom molded parts that must perform reliably in electrically sensitive, chemically aggressive, and thermally demanding environments. EMI and RFI shielding systems often operate in harsh conditions that include exposure to fuels, oils, solvents, elevated temperatures, and outdoor environments, making material durability just as critical as electrical performance.
Viton™ O-rings, gaskets, and custom molded parts provide excellent resistance to fuels, oils, lubricants, and many chemicals while maintaining stable mechanical properties over a wide temperature range. In EMI and RFI shielding applications, Viton™ is frequently used as the elastomeric base material for conductive gaskets, environmental seals, and hybrid shielding components where long-term compression set resistance, chemical stability, and environmental sealing are required.
The engineers and consultants at Canyon Components work closely with customers designing EMI and RFI shielding systems to ensure Viton™ is applied correctly as part of a complete shielding and sealing solution. Contact our expert staff for assistance selecting Viton™ O-rings, gaskets, and custom molded parts for EMI and RFI shielding applications.
Common names include: FKM (Fluorocarbon), Fluorocarbon Rubber
Trade names include: Viton™, Fluorel®, Technoflon®, Dai-El®
Features of Viton™ in EMI and RFI Shielding Applications
- Viton™ O-rings, gaskets, and custom molded parts provide excellent resistance to fuels, oils, lubricants, and environmental contaminants
- Viton™ materials maintain stable mechanical properties across wide temperature ranges
- Viton™ O-rings and gaskets exhibit low compression set for long-term sealing in shielding enclosures
- Viton™ materials offer excellent resistance to ozone, weathering, and aging in outdoor or exposed environments
- Viton™ compounds are suitable for use as environmental seals in EMI/RFI shielding assemblies
- Viton™ materials are compatible with conductive fillers, meshes, and fabric-over-foam shielding systems
Limitations of Viton™ in EMI and RFI Shielding Service
- Viton™ O-rings, gaskets, and custom molded parts are electrically insulating and do not provide shielding effectiveness on their own
- Viton™ materials have poor resistance to continuous hot water and superheated steam
- Viton™ compounds are not recommended for strong amines, ketones, or highly polar solvents
- Viton™ service temperature range varies by compound, with a typical maximum of 437°F (225°C)
- Certain shielding applications require conductive elastomers rather than standard FKM
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 (Viton™) Materials Available for EMI and RFI Shielding Service
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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Temperature Search (°C)
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.
What Are EMI and RFI Shielding Grade Materials?
EMI and RFI shielding grade materials are components specifically designed to attenuate electromagnetic and radio frequency energy while also providing mechanical sealing and environmental protection. In many shielding systems, elastomers serve a dual role: maintaining enclosure integrity while supporting conductive elements that provide grounding and shielding continuity.
Common Considerations for EMI/RFI Shielding Elastomers
- Environmental Sealing: Elastomers must prevent ingress of dust, moisture, and contaminants that can degrade shielding performance
- Compression Set Resistance: Long-term compression stability is critical to maintaining consistent contact pressure in shielding gaskets
- Chemical Resistance: Materials must withstand oils, fuels, solvents, and cleaning agents used in industrial and defense environments
- Thermal Stability: Elastomers must perform under thermal cycling without hardening or cracking
- Compatibility with Conductive Media: Materials must bond or integrate effectively with conductive fillers, meshes, or coatings
- Traceability: Materials should be traceable for quality assurance and regulated applications
Key Standards Relevant to EMI and RFI Shielding Applications
- MIL-DTL-83528 (Shielding Gaskets): This specification covers electrically conductive elastomer gaskets used for EMI/RFI shielding. Viton™ compounds may be used as environmental sealing elements within systems designed to meet this specification.
- Environmental and Mechanical Standards: EMI/RFI shielding systems must also meet environmental durability requirements for vibration, shock, temperature cycling, and chemical exposure—areas where Viton™ provides significant value.
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.
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EMI and RFI Shielding Materials Available
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Canyon Components supports EMI and RFI shielding system designers with material selection, hybrid gasket design, and custom sealing solutions that balance environmental sealing with shielding performance. Whether your application requires Viton™ for chemical resistance or a conductive elastomer for shielding continuity, our engineering team can help you design a reliable solution.
Canyon Components strives to meet all customer service requests. Feel free to contact Canyon Components engineering and let our knowledgeable staff help you design the perfect part for your needs.
CanGuard™ RFI & EMI Shielding Materials
Canyon Components supplies CanGuard EMI and RFI shielding O-rings, gaskets, and custom parts in silicone, fluorosilicone, EPDM, and conductive rubber or plastic. Designed to protect sensitive electronics, aerospace systems, defense equipment, and telecom devices from electromagnetic and radio frequency interference. Available in AS568 and custom sizes.
Fluorosilicone (FVMQ)
Fluorosilicone O-rings and gaskets combine fuel and oil resistance with low-temperature flexibility, making them suitable for EMI shielding gaskets exposed to harsh aerospace and industrial environments.
Silicone (VMQ, PVMQ)
Silicone-based conductive elastomers filled with silver, nickel, or graphite are widely used for EMI and RFI shielding. They combine flexibility, environmental sealing, and electrical conductivity in enclosure and panel applications.
EPDM (Ethylene Propylene)
EPDM O-rings and gaskets are commonly used alongside shielding materials to provide water, steam, and ozone resistance where EMI performance is not required.
NBR (Nitrile, Buna-N)
NBR O-rings and gaskets are used in EMI and RFI applications requiring good oil and fuel resistance with cost-effective environmental sealing. While not inherently conductive, specialty filled NBR compounds can support shielding performance when 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 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 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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