Fiberglass Reinforced Silicone Sheeting
Fiberglass Reinforced Silicone Sheeting is a plain-weave fiberglass-reinforced solid silicone elastomer engineered for demanding static and dynamic sealing applications where enhanced tensile and tear strength are required. The composite construction provides a minimum combined tensile strength of 1,300 psi with excellent weatherability and resistance to swell in lubricating oils. The material maintains physical properties across a wide temperature range of -80°F to +500°F.
Key Properties
- Durometer, Shore “A”: 70 ±10 — ASTM D2240
- Tensile Strength (Fiberglass & Silicone), psi: 1300 Min — —
- Compression Set, %: 35 Maximum — —
- Fiberglass Break Strength, psi: 400×350 — —
- Fiberglass Thickness: .014″ — —
- Service Temperature: -80°F to +500°F
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- Specifications
- Applications
- General Info
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Physical Properties
| Property | Value | Test Method |
| Durometer, Shore “A” | 70 ±10 | ASTM D2240 |
| Fiberglass Thickness | .014″ | — |
| Fiberglass Weight, oz/sqyd | 12.5 | — |
| Tensile Strength (Fiberglass & Silicone), psi | 1300 Min | — |
| Fiberglass Break Strength, psi | 400×350 | — |
| Compression Set, % | 35 Maximum | — |
| Plain Weave Thread Count | 20×18 | — |
Compliance
- AMS3320 — Compliant
- AMS3315 — Compliant
- FDA Title 21 CFR 177.2600 — Compliant (ingredients listed; rubber articles intended for repeated use in contact with food)
- Aerospace static and dynamic seals and gaskets requiring high tensile and tear strength
- Automotive high-strength gasketing in oil-exposed engine and drivetrain environments
- General industrial sealing where unreinforced silicone is insufficient for the mechanical load
- Food-contact sealing components requiring CFR 177.2600 compliance
- Die-cut high-strength gaskets for wide-temperature service across aerospace and industrial applications
Common industries: Aerospace, automotive, industrial manufacturing, food processing.
Fiberglass Reinforced Silicone Sheeting is a composite elastomer constructed from a plain-weave fiberglass scrim embedded in a 70 Shore A solid silicone matrix.
The fiberglass reinforcement is the defining feature of this product: the composite achieves a minimum combined tensile strength of 1,300 psi and a fiberglass break strength of 400×350 psi, enabling use in static and dynamic sealing applications where an unreinforced solid silicone sheet would be insufficient.
The plain weave construction uses a thread count of 20×18 and a fiberglass weight of 12.5 oz/sqyd, providing consistent reinforcement throughout the sheet. The material is rated for service from -80°F to +500°F and maintains its physical properties across that range.
In addition to its high strength, Fiberglass Reinforced Silicone Sheeting provides excellent weatherability, UV and ozone resistance, and resistance to swell in various lubricating oils — properties that extend its suitability to outdoor industrial and automotive gasketing environments. Compression set is controlled to a maximum of 35%, supporting consistent sealing force under sustained compression.
The material carries FDA/Food Contact compliance, with ingredients listed in CFR 177.2600 for rubber articles intended for repeated use in contact with food.
Compliant with AMS3320, AMS3315, and FDA Title 21 CFR 177.2600 (ingredients listed; rubber articles intended for repeated use in contact with food).
What differentiates Fiberglass Reinforced Silicone Sheeting from unreinforced solid silicone sheeting?
The plain-weave fiberglass reinforcement gives Fiberglass Reinforced Silicone Sheeting a minimum combined tensile strength of 1,300 psi and a fiberglass break strength of 400×350 psi — significantly higher than unreinforced solid silicone grades. This makes it appropriate for dynamic sealing applications, high-stress gasket joints, and environments where silicone alone would stretch, tear, or extrude under load.
Why is compression set important for a reinforced silicone sealing material?
Even with fiberglass reinforcement, the silicone matrix in Fiberglass Reinforced Silicone Sheeting is responsible for the long-term sealing force under a compressed joint. A high compression set means the material does not recover its original thickness after sustained compression — reducing the residual clamping force on the seal over time. Fiberglass Reinforced Silicone Sheeting controls compression set to a maximum of 35%, helping maintain consistent sealing performance over the service life of the gasket.
What is the operating temperature range for Fiberglass Reinforced Silicone Sheeting?
-80°F to +500°F, as listed on the TDS.
Is Fiberglass Reinforced Silicone Sheeting suitable for aerospace and food-contact applications?
Yes. Fiberglass Reinforced Silicone Sheeting is compliant with AMS3320 and AMS3315 for aerospace use. For food-contact applications, the ingredients are listed in FDA Title 21 CFR 177.2600 for rubber articles intended for repeated use in contact with food.
How should Fiberglass Reinforced Silicone Sheeting be specified?
Specify Fiberglass Reinforced Silicone Sheeting, thickness, applicable compliance specification (AMS3320, AMS3315, CFR 177.2600 as applicable), dimensional tolerances, and finished format.
