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 standard from the U.S. Code of Federal Regulations (CFR) used by the aerospace/aviation industry.
  • This material is compliant with the requirements of FAR 25.853.
  • The Horizontal Bunsen Burner test is used to determine the resistance of cabin and cargo compartment materials to a flame applied for 15-seconds.
  • It is most commonly used to show compliance with 14 CFR 25.853(a) or in our case 14 CFR 25.853(a) at Amdt. 25-116; Appendix F, Part I(a)(1)(iv) & (v).




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