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High Strength Extreme Low Temperature Silicone

High strength extreme low-temperature solid silicone sheeting from ElastaPros combine exceptional tear strength and high tensile resilience with sub-zero flexibility down to −178°F (−116°C). Engineered for severe thermal cycling, these high-performance materials maintain continuous sealing integrity up to +450°F (+232°C), with intermittent heat resistance to +525°F (+274°C).

This material complies with A-A-59588 Class 1A/1B and aerospace standards AMS 3334, AMS 3335, AMS 3336, AMS 3337, AMS 3345, and AMS 3346. It’s ideal for cryogenic, aerospace, and defense gasketing.

Every batch is Made in USA under ElastaPro’s ISO 9001:2015 / AS9100D quality system and shipped with a complete Certificate of Analysis (COA).

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We supply continuous rolls, pre-cut sheets, and uncured compounds with low minimums and fast lead times.

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High Strength Extreme Low Temperature Silicone Sheets (30 to 80 Durometer)

Choose high strength extreme low temperature silicone in the following durometers.

  • ESS30HS/LT – 30 Durometer
  • ESS40HS/LT – 40 Durometer
  • ESS50HS/LT – 50 Durometer
  • ESS60HS/LT – 60 Durometer
  • ESS70HS/LT – 70 Durometer
  • ESS80HS/LT – 80 Durometer

Standard Sheet Sizes & Roll Dimensions

Solid silicone sheet from ElastaPro is available in these sizes and roll dimensions.

Widths

  • Standard: 36″ (914 mm) and 48″ (1219 mm)
  • Custom: Up to 67″ (1701.8 mm) — among the widest available in the industry

Linear Lengths

  • Continuous rolls up to 300+ yards depending on thickness

Thickness Range

  • 0.005″ to 0.675″ (0.13 mm to 17.145 mm)

Cut Sheet Sizes

  • 12″ × 12″
  • 24″ × 24″
  • 36″ × 36″
  • 48″ × 48″
  • Custom dimensions available

High Strength Extreme Low Temperature Silicone FAQs

What is high-strength, extreme-low-temperature silicone?

High-strength, extreme-low-temperature silicone is a specialized grade of silicone elastomer (PVMQ/phenyl-based) engineered to retain high tensile strength, exceptional tear resistance, and mechanical toughness at temperatures where standard silicones become rigid or brittle. It combines sub-zero flexibility down to −100°F (−73°C) or colder with the structural durability required for high-stress sealing applications.

What are the main performance advantages of high-strength extreme-low-temperature silicone?

This specialized elastomer delivers a unique combination of mechanical toughness and environmental resistance, including:

  • Sub-Zero Flexibility: Remains soft, pliable, and functional without cracking or embrittlement under extreme cold.

  • Superior Mechanical Strength: Features elevated tensile strength (typically >1000 psi / >7 MPa), high tear propagation resistance, and high elongation.

  • Wide Thermal Range: Performs continuously from −100°F to +450°F (−73°C to +232°C), with high-tier formulations reaching down to −178°F (−116°C).

  • Low Compression Set: Maintains strong sealing force and elastic rebound after long-term compression under cold exposure.

  • Outdoor & Chemical Resistance: Resists UV radiation, ozone, arctic weathering, and mild oils or solvents.

What applications and industries require high-strength extreme-low-temperature silicone?

Because it prevents seal failure in severe sub-zero environments, this material is specified for critical applications across high-demand sectors:

  • Aerospace & Defense: High-altitude aircraft door/hatch seals, wing flap gaskets, and military enclosures (compliant with A-A-59588 Class 1A/1B and AMS 3334/3335/3346).

  • Cryogenic Equipment: Seals and valve gaskets for liquefied natural gas (LNG), space launch systems, and medical cold chain storage.

  • Arctic & Deep-Sea Energy: Exploration equipment, seals, and protective boots operating in polar or deep-water marine environments.

  • Cold Storage Logistics: High-durability commercial freezer door gaskets and transport Seals.

How does high-strength extreme-low-temperature silicone compare to standard low-temperature silicone?

While standard low-temperature silicones remain flexible in the cold, they often suffer from low tear strength and poor tensile performance, making them susceptible to ripping or deforming under mechanical stress. High-strength variants incorporate reinforced polymer backbones and treated silica fillers to double the tear resistance, allowing the gasket to endure high bolting torque, pressure surges, and dynamic flexing in frigid conditions.

What military and aerospace specifications cover high-strength extreme-low-temperature silicone?

High-strength extreme-low-temperature silicone sheeting is engineered to comply with major defense and aerospace standards, including:

  • A-A-59588 Class 1A & Class 1B: Military specification for low-temperature resistant silicone rubber.

  • AMS 3334, AMS 3335, and AMS 3346: Aerospace Material Specifications covering extreme low-temperature silicone sheets, strips, and molded shapes across various durometers.

What standard durometers and thicknesses are available for high-strength extreme-low-temp sheeting?

High-strength extreme-low-temperature silicone sheeting is typically manufactured in Shore A hardness levels ranging from 40 to 80 Durometer. Standard continuous roll stock and press-cured sheeting are available in thicknesses from 0.010″ up to 0.500″, with standard roll widths up to 36″ or 48″.

Can high-strength extreme-low-temperature silicone be supplied with an adhesive backing (PSA)?

Yes. High-strength extreme-low-temperature silicone sheeting can be laminated with factory-applied pressure-sensitive adhesives (PSA), such as high-tack acrylic or silicone-based adhesives, to streamline die-cut gasket positioning and assembly during manufacturing.

Does high-strength extreme-low-temperature silicone resist fuel immersion?

High-strength extreme-low-temperature silicone resists mild oils, splashing lubricants, and environmental exposure, but prolonged immersion in fuels (such as jet fuel or gasoline) or aromatic hydrocarbons will cause material swell. For applications requiring both extreme cold flexibility and continuous fuel immersion, fluorosilicone (FVMQ) is recommended.