Extra Firm Silicone Sponge Rubber Sheet | National Silicone

Extra Firm Silicone Sponge

Closed Cell Silicone Sponge Rubber

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

Silicone Stripping

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

 

KEY FEATURES

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

 

STANDARDS

  • ASTM D1056
  • ASTM D412

MATERIAL AVAILABILITY

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, color matching available

 

TEMPERATURE RANGE

-67°F to +450°F  (-55°C to 232°C)

 

PHYSICAL PROPERTIES

Properties
Compression deflection (25%) psi (kPa) 18-35 (21-55) 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) 75 (517) typical ASTM D412

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Extra Firm Silicone Sponge Specification sheet
Download Spec Sheet

SILICONE SPONGE SHEETING GRADES

ACCREDITATION’S


ASTM D1056, D412

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ARDL-Tested

 

More Information

ASTM D1056

  • ASTM D1056 Standard Specification for Flexible Cellular Materials—Sponge or Expanded Rubber
  • This material passes the ASTM D1056 specification for silicone materials.
  • This specification covers flexible cellular rubber products known as sponge rubber and expanded rubber, but does not apply to latex foam rubber or ebonite cellular rubber.
  • The base material for an open/closed cellular product may be made of synthetic, natural, or reclaimed rubber, or a mixture, and may contain other polymers or chemicals, or both, which may be modified by organic or inorganic additives.

ASTM D412

  • ASTM D412 is a standard test methods for vulcanized rubber and thermoplastic elastomers—tension
  • This material passes the ASTM D412 specification for silicone materials.
  • ASTM D412 is the most common standard for determining the tensile properties of vulcanized (thermoset) rubber and thermoplastic elastomers. Compounds in this family are used to create a vast array of consumer goods such as tires, footballs, and rubber bands.

 

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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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