Extreme Low-Temperature / High Strength Silicone Sheeting
Extreme Low-Temperature / High Strength Silicone Sheeting is a PVMQ-based solid silicone elastomer combining cryogenic-rated cold flexibility with elevated tensile and tear strength for the most demanding aerospace, defense, and cryogenic sealing applications. With a service range of -178°F to +450°F (525°F intermittent) and compliance to A-A-59588 CL1A/1B/3A and AMS 3334–3346, it offers broader specification coverage than the standard PVMQ grade. Available from 30 to 80 Shore A durometer as a made-to-order product, in thicknesses from .010″ to .500″ and widths up to 60″ in many colors.
Key Properties
- Durometer, Shore “A”: 30 ±5 to 80 ±5 (six grades) — ASTM D2240
- Tensile Strength, psi: 850–1200 (varies by grade) — ASTM D412
- Elongation, %: 125–500 (varies by grade) — ASTM D412
- Tear, ppi Die “B”: 100–175 (varies by grade) — ASTM D624
- Service Temperature: -178°F to +450°F (525°F intermittent)
- Specifications: A-A-59588 CL1A/1B/3A; AMS 3334, 3335, 3336, 3337, 3338, 3345, 3346
We want to help!
Enter your information and we'll get you in touch with our knowledgable staff. We know how important to the right product for your project.
Request a Consultation
- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Test Method | 30 Duro | 40 Duro | 50 Duro | 60 Duro | 70 Duro | 80 Duro |
| Durometer, Shore “A” | ASTM D2240 | 30 ±5 | 40 ±5 | 50 ±5 | 60 ±5 | 70 ±5 | 80 ±5 |
| Tensile Strength, psi | ASTM D412 | 850 | 1000 | 1200 | 1100 | 1100 | 950 |
| Elongation, % | ASTM D412 | 500 | 200 | 500 | 500 | 400 | 125 |
| Tear, ppi Die “B” | ASTM D624 | 100 | 140 | 175 | 150 | 150 | 150 |
Compliance
- A-A-59588 CL1A/1B/3A — Compliant
- AMS 3334 — Compliant
- AMS 3335 — Compliant
- AMS 3336 — Compliant
- AMS 3337 — Compliant
- AMS 3338 — Compliant
- AMS 3345 — Compliant
- AMS 3346 — Compliant
- Cryogenic system seals and gaskets requiring rated performance to -178°F
- Aerospace and defense extreme cold-environment sealing to the broadest AMS and A-A specification coverage
- High-strength low-temperature die-cut gaskets where standard PVMQ mechanical properties are insufficient
- Military-spec sealing components per AMS 3345, 3346, and A-A-59588 CL3A
- Outdoor and UV-exposed sealing assemblies in extreme temperature environments
Common industries: Aerospace, defense, cryogenics, military, industrial manufacturing.
Extreme Low-Temperature / High Strength Silicone Sheeting is a PVMQ solid elastomer engineered as a higher-performance upgrade to the standard Extreme Low-Temperature Silicone Sheeting grade.
Where the standard PVMQ grade is rated to -130°F, Extreme Low-Temperature / High Strength Silicone Sheeting extends the low-temperature service limit to -178°F — approximately 48°F lower — enabling use in the most extreme cryogenic applications including liquid nitrogen-proximity service and deep cold aerospace environments.
Simultaneously, the High Strength formulation delivers elevated tensile and tear values across all durometer grades compared to the standard PVMQ product, providing greater mechanical robustness in demanding sealing assemblies. The material is made to order, available from 30 to 80 Shore A in many colors, in thicknesses from .010″ to .500″ and widths up to 60″.
Extreme Low-Temperature / High Strength Silicone Sheeting offers expanded specification coverage relative to the standard PVMQ grade: in addition to A-A-59588 CL1A/1B and AMS 3334–3338, this grade adds compliance to A-A-59588 CL3A and AMS 3345 and 3346 — specifications that address higher-performance or specialized requirements within the low-temperature silicone elastomer family. The material is UV and ozone resistant and an excellent electrical insulator, fabricated from high-quality raw materials.
Compliant with A-A-59588 CL1A/1B/3A, AMS 3334, AMS 3335, AMS 3336, AMS 3337, AMS 3338, AMS 3345, and AMS 3346.
What differentiates Extreme Low-Temperature / High Strength Silicone Sheeting from the standard Extreme Low-Temperature Silicone Sheeting grade?
Extreme Low-Temperature / High Strength Silicone Sheeting extends the cold-side service limit from -130°F (the standard grade) to -178°F, providing approximately 48°F of additional low-temperature capability. It also delivers higher tensile and tear strength across equivalent durometer grades, and adds compliance to A-A-59588 CL3A and AMS 3345 and 3346 — specifications not covered by the standard PVMQ grade. For programs requiring the most demanding cryogenic performance or the broadest AMS low-temperature silicone specification coverage, Extreme Low-Temperature / High Strength Silicone Sheeting is the appropriate selection.
Why does low-temperature flexibility matter in PVMQ elastomer selection?
PVMQ elastomers are selected specifically because their phenyl-modified polymer backbone resists the stiffening and embrittlement that causes standard VMQ silicone to lose sealing effectiveness at extreme cold. In cryogenic applications — such as liquid nitrogen systems, deep-space hardware, or high-altitude aerospace assemblies — the elastomer must remain flexible and maintain compressive sealing force at the design temperature, not just at room temperature. Extreme Low-Temperature / High Strength Silicone Sheeting's -178°F rating provides a documented performance floor that the sealing system can be designed against.
What is the operating temperature range for Extreme Low-Temperature / High Strength Silicone Sheeting?
-178°F to +450°F (525°F intermittent), as listed on the TDS.
Is Extreme Low-Temperature / High Strength Silicone Sheeting suitable for aerospace and military procurement programs?
Yes. Extreme Low-Temperature / High Strength Silicone Sheeting complies with A-A-59588 CL1A/1B/3A and AMS 3334, 3335, 3336, 3337, 3338, 3345, and 3346 — a comprehensive set of low-temperature PVMQ silicone specifications commonly cited in aerospace and defense procurement documents.
How should Extreme Low-Temperature / High Strength Silicone Sheeting be specified?
Specify Extreme Low-Temperature / High Strength Silicone Sheeting, durometer (30, 40, 50, 60, 70, or 80 Shore A), thickness, color, applicable compliance specification (A-A-59588 class or AMS number), dimensional tolerances, and finished format. Note that this is a made-to-order product.
