Fiberglass Reinforced Flame Retardant Silicone sponge is an excellent material for gasketing applications that require a compressible material. The Fiberglass gives it dimensional stability which also helps in cutting close tolerance parts. It is resistant to extreme temperatures. It comes in a dark blue/grey color. The surface has a fine fabric finish on both sides and is available in continuous rolls up to 1/2" thick. Request for quote.

The given values are typical properties and are provided for information only. They should not be used to set specification requirements. It is up to the end user to determine whether the material is suitable for the intended application.
Unit of Measure



N/A Silicone


N/A Closed Cell Sponge


N/A Medium
Color1 N/A Dark Blue Grey

Density Under 1/4" thick

N/A 0.020 lbs/in³

Density Over 1/4" thick

N/A 0.018 lbs/in³

Compression Deflection

N/A 6 to 14 psi

Compression Set

N/A 15 %

Temperature Range

N/A -103 to 450 ºF

Tensile Strength (with Fiberglass)

N/A 900 psi

Lead Time

N/A Call or Email Customer Service

Testing Information

Physical Properties

Properties Test Method
Density, lbs/cubic in. Under 1/4" thick (ASTM D- 297)
Density, lbs/cubic in. Over 1/4" thick (ASTM D- 297)
Compression Deflection, PSI (ASTM D- 1056)
Compression Set (ASTM D- 1056)
Water Absorption (ASTM D- 1056)
Tensile Strength, PSI (with Fiberglass) (ASTM D- 412)



  • Flame Retardant
  • High Compressibility
  • Low Compression Set
  • UV / Ozone Resistant
  • High Tensile Strength

  • 1 Dark blue is standard color.