Firm Silicone Sponge | AMS3196 | National Silicone

AMS3196 Silicone Sponge

Closed Cell Silicone Sponge

This firm silicone sponge is ideal for demanding sealing and gasket applications.

Firm Density Silicone Sponge
It is produced with a fabric finish on both sides, is flexible and can handle extreme temperature environments. It also offers excellent compression set resistance and can maintain its resiliency under extended compression.

In Stock with Immediate Availability



  • Excellent for seals and gaskets
  • High compressibility
  • Low compression set
  • UV/Ozone resistant



  • AMS3196
  • FAR 25.853



Available in – Continuous rolls or cut sheets
Thickness available (in) – 0.0625 to 0.500
Typical roll lengths (ft) – 25 to 100
Typical roll widths (in) – 36
Surface finishing – Fabric impression finish, both sides
Cell structure – Closed cell
Color – Red/orange, grey, black, white, *color matching available

*Subject to MOQ



-103°F to +450°F  (-75°C to 232°C)


Compression deflection (25%) psi (kPa) 12-20 (83-138) ASTM D1056
Density < 0.25” thick pcf (kg/m3) 52 (830) max. ASTM D1056
Density ≥ 0.25” thick pcf (kg/m3) 43 (692) max. ASTM D1056
Compression set (22h, 100°C) % 60 max. ASTM D1056
Tensile strength psi (kPa) 100 (689) typical. ASTM D412

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More Information


  • AMS3196 is an aerospace material specification is from SAE International Group.
  • The specification covers silicone rubber sponge in the form of sheet, strip, extrusions, and molded shapes.
  • Our firm density silicone sponge sheet is in accordance with the physical property requirements of AMS3196 test standard.
  • This product has been used typically for general applications requiring closed-cell, firm sponge rubber that will be flexible from -75 to +205 °C (-103 to +401 °F), but usage is not limited to such applications. Compression set may be high at the higher temperature.


FAR 25.853

  • FAR 25.853 is a regulation part of the Federal Aviation Regulations (FARs), specifically addressing flammability requirements for materials used in the construction of commercial aircraft.
  • The regulation mandates that materials used inside the aircraft cabin, such as seat cushions, wall panels, and flooring, must be flame-resistant and able to withstand specific fire tests.
  • It includes specific criteria and test methods for assessing the flammability of these materials, ensuring that they do not easily ignite and, if they do, that they burn slowly and self-extinguish.
  • Compliance with FAR 25.853 is critical for aircraft certification, focusing on enhancing passenger safety by minimizing the risks associated with in-flight fires.




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We support our customers, and prospects throughout the purchase journey. Our team is made up of experienced professionals and highly trained engineers who will help with material selection, sampling, testing, and any application support you might need to accomplish your goals.




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