What is the primary difference between silicone and fluorosilicone?

While both elastomers offer exceptional thermal stability across identical temperature ranges, standard silicone (VMQ) lacks chemical resistance. If exposed to fuels, oils, or solvents, standard silicone will swell, soften, and lose its physical integrity. Fluorosilicone (FVMQ) features fluorinated side chains that actively repel hydrocarbons, allowing it to maintain its sealing properties while fully submerged in harsh chemicals, aviation fuels, and petroleum products.

In what temperature environments can this material operate?

Our specification-grade compound is engineered to withstand extreme thermal fluctuations. It remains flexible and operational at temperatures as low as -60°C (-76°F) and resists degradation, hardening, or cracking during continuous high-temperature exposure up to +200°C (+392°F).

Is the material resistant to automotive and aviation fuels?

Yes. The primary engineering benefit of this fluorinated polymer is its superior resistance to a wide array of fluids. This includes jet fuels (such as JP-4, JP-5, and JP-8), aviation gasoline, motor oils, synthetic lubricants, hydraulic fluids, and chlorinated solvents.

What specifications do these sheets comply with?

ElastaPro manufactures these materials to meet rigorous defense and aerospace standards. Our current compound lineup conforms directly to AMS-R-25988B Type II Class 1 and MIL-DTL-25988D Type II Class 1 requirements, available across multiple durometer options including Grades 40, 50, 60, and 70.

Are custom roll widths and thicknesses available for ordering?

Yes. Because industrial applications require exact dimensions to ensure proper seal compression, we manufacture our sheeting to your specific project requirements. We offer custom roll widths, specific thicknesses, and continuous sheet configurations. Please contact our engineering team to submit a Request for Quote (RFQ).

Is fluorosilicone the same as fluoro silicone?

Yes. There is no technical difference.

Fluorosilicone Rubber Sheeting (FVMQ), Rolls & Uncured Compound

ElastaPro’s specification-grade fluorosilicone rubber (FVMQ) combines the wide temperature flexibility of solid silicone with the aggressive chemical, fuel, and solvent resistance of a fluorocarbon. Engineered for critical aerospace, defense, and industrial sealing challenges, our high-performance fluoro silicone sheet and roll stock deliver an impenetrable barrier against jet fuels, petroleum oils, and synthetic hydraulic fluids where standard elastomers fail.

All ElastaPro fluorosilicone products are Made in America at our Santa Fe Springs, CA facility under our certified ISO 9001:2015 / AS9100D Quality Management System. We provide a full Certificate of Analysis (COA), lot traceability, and physical property verification with every shipment.

40 to 70 Durometer Fluorosilicones: FVMQ Gasket Material

Click the links below to download technical data sheets

Fluoro Silicone Material Specifications & Military Compliance

ElastaPro manufactures specification-grade fluorosilicone rubber sheeting designed to meet stringent military, defense, and aerospace standards. The table below details physical properties for compounds conforming to AMS-R-25988B Type II Class 1 (which supercedes MIL-DTL-25988 on new design drawings) and MIL-DTL-25988D.

Grade / Durometer	Specification Conformance	Tensile Strength	Elongation %	Properties & Sealing Characteristics
ESS40FS (40 Shore A)	AMS-R-25988B Type II Class 1 Grade 40	800 PSI min.	350% min.	Low durometer for high compressibility; ideal for low closure-force gaskets.
ESS50FS (50 Shore A)	AMS-R-25988B Type II Class 1 Grade 50	850 PSI min.	300% min.	Medium-low durometer balancing conformability with mechanical seal integrity.
ESS60FS (60 Shore A)	AMS-R-25988B Type II Class 1 Grade 60	900 PSI min.	250% min.	Standard mid-range durometer optimizing tensile strength and compression set.
ESS70FS (70 Shore A)	AMS-R-25988B Type II Class 1 Grade 70	950 PSI min.	200% min.	High durometer for high-pressure fluid sealing and superior wear resistance.

ElastaPro also manufactures aerospace-grade fluoro silicone compounds conforming to AMS 3325, AMS 3326, and AMS 3327.

Fluorosilicone Sheets, Continuous Rolls & Uncured Compounds

Whether you require die-cut gasket stock or uncured fluorosilicone rubber compound for calendering and molding, ElastaPro provides tailored product forms to meet exact manufacturing tolerances.

Fluorosilicone Sheeting & Rolls

Thicknesses: .010” to .500” (0.25mm to 12.7mm)
Roll Widths: Standard 36” and custom widths up to 65” wide
Durometers: 40, 50, 60, and 70 Shore A
Standard Color: Blue (Custom customer colors available)

Uncured Fluorosilicone Compounds

Formulations: Precision-compounded FVMQ masterbatches
Catalyst Options: Peroxide-cured or platinum-cured systems
Applications: Custom molding, extruded profiles, and fabric calendering
Traceability: Batch-tested physical property certificates included

Performance Characteristics: Fluorosilicone Rubber vs. Standard Silicone

Understanding the distinction between standard silicone (VMQ) and fluorosilicone rubber (FVMQ) is essential when specifying seals for hostile chemical environments:

Standard Silicone Rubber (VMQ): Exceptional thermal range (-80°F to +450°F) and atmospheric weather resistance. However, when exposed to hydrocarbons, petroleum fuels, or motor oils, standard silicone absorbs the fluid, experiencing extreme volume swell, severe softening, and rapid seal failure.
Fluorosilicone Rubber (FVMQ): Synthesized with fluorinated side chains off the polymer backbone, fluoro silicone actively repels non-polar solvents, fuels, and oils. It maintains the identical broad thermal stability of silicone (-60°C to +200°C / -76°F to +392°F) while serving as an inert chemical barrier.

Chemical & Fluid Resistance Profile

ElastaPro’s spec-grade FVMQ sheeting maintains dimensional stability and seal recovery when continuously submerged in:

Aviation and military jet fuels (JP-4, JP-5, JP-8) and aviation gasoline
Petroleum oils, synthetic lubricants, and engine fluids
Automotive fuels and transmission fluids
Chlorinated and aromatic solvents

Fluoro Silicone Applications & Industry Uses

Due to its dual resistance to extreme temperatures and aggressive media, fluorosilicone rubber sheet material is widely specified across demanding industrial sectors:

Aerospace & Defense: Fuel tank access panel seals, canopy gaskets, firewall access barriers, and O-rings.
Automotive & Transportation: Turbocharger diaphragms, exhaust gas recirculation (EGR) valve seals, and quick-connect fuel line gaskets.
Industrial Fluid Processing: Chemical blending valve seats, solvent recovery system seals, and fuel storage gaskets.

Frequently Asked Questions

What is the difference between fluorosilicone and flourosilicone?

Fluorosilicone is the correct technical name for fluorinated silicone rubber (FVMQ). “Flourosilicone” and “fluoro silicone” are common alternate spellings and spacing variations used interchangeably across engineering documents and purchasing catalogs. They all refer to the exact same polymer formulation.

What is the primary benefit of fluorosilicone rubber over standard silicone?

While both elastomers withstand extreme cold and heat (-76°F to +392°F), standard silicone swells and degrades when exposed to petroleum products. Fluorosilicone features fluorinated side chains that actively repel fuels, jet propellants, oils, and harsh solvents.

What military and aerospace specs does ElastaPro fluorosilicone comply with?

Our material lineup conforms to AMS-R-25988B Type II Class 1, MIL-DTL-25988D Type II Class 1, AMS 3325, AMS 3326, and AMS 3327 across 40, 50, 60, and 70 Shore A durometers.

Can fluoro silicone sheeting be supplied in custom widths and colors?

Yes. While standard fluorosilicone rubber sheeting is supplied in blue continuous rolls up to 65” wide, ElastaPro offers custom color matching, specific thickness slicing, and custom roll slitting to meet your exact die-cutting requirements.

Fluorosilicone Rubber Sheeting (FVMQ), Rolls & Uncured Compound

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