Specification Grade Silicones

AMS Aerospace Grade Silicone Sheets & Uncured Compounds

ElastaPro manufactures a comprehensive portfolio of Aerospace Material Specifications (AMS) solid silicone sheeting and uncured silicone compounds designed for high-reliability military, defense, and commercial aerospace applications. Developed and maintained by SAE International, AMS specifications establish strict chemistry, mechanical property, and thermal endurance benchmarks for elastomers used across aerospace flight hardware and ground support equipment.

Whether your application requires low-temperature flexibility, high-strength tear resistance, or low compression set under continuous thermal loads, ElastaPro AMS silicones deliver consistent batch-to-batch performance. Every lot is Made in the USA at our Santa Fe Springs, California facility under our ISO 9001:2015 and AS9100D certified quality management system and shipped with a complete Certificate of Analysis (COA).

Need AMS Aerospace Grade Silicone Sheeting or Slit Rolls?

We supply continuous rolls, pre-cut solid sheets, and uncured compounds across common AMS Callouts (including AMS3301, AMS3302, AMS3303, AMS3304, AMS3305, and AMS3335) with low minimums and fast lead times.

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AMS Silicones from ElastaPro

SAE International AMS standards designate silicone materials by durometer, thermal rating, and physical properties.

AMS Spec Material Classification / Description Primary Application Focus
AMS 3195 Closed‑cell medium‑density silicone sponge; flexible from −103°F to +401°F. General‑purpose aerospace sponge gasketing; environmental sealing.
AMS 3301 40‑durometer solid silicone, resistant to weathering and petroleum‑based lubricating oils. Ambient‑temperature seals, gaskets, tubing, molded shapes.
AMS 3302 50‑durometer solid silicone, weathering‑ and oil‑resistant. General‑purpose aerospace seals and gaskets.
AMS 3303 60‑durometer solid silicone, weathering‑ and oil‑resistant. Higher‑durometer seals, gaskets, molded components.
AMS 3304 70‑durometer solid silicone, peroxide‑cured; weathering‑ and oil‑resistant. High‑durometer sealing applications; aerospace environmental gaskets.
AMS 3305 80‑durometer solid silicone, weathering‑ and oil‑resistant. Heavy‑duty seals requiring high hardness and stability.
AMS 3306 Solid silicone, 85–90 durometer class (adjacent to 3305). High‑compression, high‑load sealing; structural aerospace gasketing.
AMS 3307 Solid silicone, extra‑firm durometer class. Applications requiring minimal compression and maximum dimensional stability.
AMS 3325 Fuel‑resistant fluorosilicone, ~60 durometer; meets AMS 3325 fuel exposure requirements. Fuel‑system gaskets, aerospace components exposed to hydrocarbons.
AMS 3326 Fuel‑resistant fluoroslicone variant with alternate durometer. Hydrocarbon‑exposed seals where moderate hardness is required.
AMS 3327 Fuel‑resistant silicone, higher durometer than 3325/3326. Fuel‑system sealing with increased mechanical strength.
AMS 3332 20‑durometer soft aerospace silicone, very flexible. Low‑durometer cushioning, vibration isolation, soft sealing.
AMS 3334 Low‑durometer silicone in the 333X soft‑material family. Soft seals, vibration damping, flexible aerospace gasketing.
AMS 3335 Medium‑soft silicone, slightly firmer than 3332/3334. Flexible seals requiring moderate mechanical strength.
AMS 3336 Mid‑range durometer silicone in the 333X series. General aerospace sealing with balanced flexibility and strength.
AMS 3337 Higher‑durometer silicone within the 333X series. Structural seals requiring reduced compression and higher rigidity.
AMS 3338 Firm silicone variant in the 333X series. High‑load sealing, molded aerospace components.
AMS 3345 50‑durometer silicone, ready‑to‑mold compound; meets AMS 3345. Molded aerospace gaskets, O‑rings, custom‑fabricated components.
AMS 3346 Silicone compound adjacent to 3345, likely alternate cure system. Molded aerospace components requiring specific cure chemistry.
AMS 3348 Silicone compound in the 334X family, mid‑durometer. Molded parts, fabricated gaskets, aerospace sealing.
AMS 3349 Higher‑durometer silicone compound in the 334X series. High‑strength molded aerospace components.
AMS 3356 Silicone meeting AMS 3356 series (not publicly described in returned sources). High‑performance aerospace sealing; specialty mechanical environments.
AMS 3357 Silicone adjacent to AMS 3356, likely similar performance class. Specialty aerospace seals requiring elevated mechanical or thermal stability.

Key Performance Advantages of AMS Aerospace Silicone

  • Extreme Temperature Stability: Retains mechanical flexibility and elastomeric seal integrity across temperatures ranging from sub-zero conditions down to -100°F (-73°C) up to elevated temperatures exceeding +450°F (+232°C).
  • Environmental & Weather Immunity: Outstanding resistance to ozone degradation, ultraviolet (UV) exposure, severe weathering, and environmental aging.
  • Low Compression Set: Engineered to resist permanent deformation under long-term compressive loads, ensuring flange and door seal longevity.
  • Secondary Fabrication Ready: Easily converted via die-cutting or waterjet cutting into custom gaskets, or supplied with optional pressure-sensitive adhesive (PSA) backings.

Aerospace & Defense Applications

  • Aircraft Environmental Control Systems (ECS): Flexible ducting seals, air handling gaskets, and cabin pressure seals.
  • Flight Hardware Gaskets: Airframe door, hatch, window, and optical enclosure weather-seals.
  • Avionics & Electronics Enclosures: EMI/RFI shielding gasket backings and environmental barrier seals for ruggedized defense electronics.
  • Vibration Dampening & Isolation: Shock-absorbing pads and engine-adjacent vibration isolation mounts.

In addition to aerospace silicones, ElastaPro makes military silicones and fluorosilicones along with many other specification grade elastomers.

Frequently Asked Questions About AMS Silicone

What is AMS silicone, and why is it required in aerospace applications?

AMS silicone refers to solid silicone rubber compounded and tested to meet specific Aerospace Material Specifications published by SAE International (e.g., AMS3301 through AMS3305). Aerospace engineers specify AMS materials because they mandate strict quality control, verified chemical composition, and precise physical property thresholds (such as tensile strength, elongation, and compression set) necessary for flight safety and regulatory compliance.

What forms does ElastaPro supply for AMS silicone materials?

ElastaPro supplies AMS aerospace silicone in ready-to-fabricate solid sheets (available in continuous rolls up to 60″ wide or pre-cut panels from .010″ to .500″ thickness) as well as uncured silicone compounds ready for compression, transfer, or injection molding.

Can ElastaPro supply AMS silicone sheets with adhesive backing?

Yes. ElastaPro AMS solid silicone sheeting can be supplied with factory-applied pressure-sensitive adhesive (PSA) backings to streamline component installation and gasket assembly. We offer standard acrylic adhesives for general bonding or high-temperature silicone adhesives for elevated temperature environments.

Are Certificates of Analysis (COA) provided with AMS silicone orders?

Yes. Because aerospace supply chains demand full traceability, every shipment of ElastaPro AMS silicone includes a comprehensive Certificate of Analysis verifying batch testing compliance against applicable SAE AMS property requirements under our AS9100D and ISO 9001:2015 quality management system.