Natural Open Cell Rubber

Natural Open Cell Rubber Sponge Material

Natural Open Cell Rubber
Natural Open Cell Rubber Sponge
Natural Open Cell Rubber
Natural Open Cell Rubber Sponge

Natural Open Cell Rubber Sponge

Natural Open Cell Rubber is one of the earliest forms of sponge rubber, created by incorporating a blowing agent such as baking soda – into uncured rubber. As the material cures, it expands under low pressure, much like a rising cake, forming a wide network of interconnected open cells.

In open cell rubber, each cell is linked to its neighbours, allowing air, gas, and water to move freely throughout the material. This structure gives it a significantly better compression set compared to closed cell rubbers. When compressed, air escapes easily from the cells, and once the pressure is released, air flows back in-enabling the rubber to return to its original shape, much like a kitchen sponge.

Open cell sponge rubber is available in both low and high densities, making it suitable for a wide range of industrial and commercial uses. Its ability to absorb shock and provide cushioning makes it ideal for repeated-use applications such as vacuum lifting seals, low-pressure gaskets, and expansion joints.

Material Properties

  • Excellent compressibility and Recovery.
  • Resilience.
  • Absorbency.
  • Flexibility at low temperature.
  • Elasticity and excellent surface adhesion.
  • Good Anti Vibration Properties.

Material Uses

  • Industrial cushioning.
  • Sound absorption.
  • Environmental – dust & dirt seals.
  • Space fillers.
  • Mechanical vibration dampening.
  • Air filters.
  • Thermal barriers and insulating, and shock absorbing padding.
  • Die Ejection.

Open Cell Sponge Datasheet

Download the specialised rubber datasheet for Natural Open Cell Rubber Sponge Material.
File size: 335kb

Datasheet

Natural Open Cell Stock Grades

Natural Open Cell 100 Black Medium Density

100 Black Medium Density

Colour: Black
Sheet Size: 915mm x 915mm

Stocked thickness 6.0mm, 8.0mm, 9.5mm and 11mm (other thicknesses are available)

Rubber Sponge 200 Tan Medium Density

200 Tan Medium Density

Colour: Tan
Sheet Size: 915mm x 915mm

Stocked thickness 8.0mm

Natural Open Cell 400 Tan Medium Density

400 Tan Medium Density

Colour: Tan
Sheet Size: 915cm x 1000mm

Stocked thickness 7.0mm, 8.0mm and 11mm (other thicknesses are available)

Rubber Sponge 500 Red Firm Density

500 Red Firm Density

Colour: Red
Sheet Size: 915cm x 1000mm

Stocked thickness 7.0mm, 8.0mm and 11mm (other thicknesses are available)

Natural Open Cell 600 Dark Red Extra Firm Density

600 Dark Red Extra Firm Density

Colour: Dark Red
Sheet Size: 915cm x 1000mm

Stocked thickness 7.0mm, 8.0mm, 11mm and 16mm (other thicknesses are available)

Specifications and tabular date for the Open Cell, Natural Rubber Sponge Material
For information and enquiries regarding specific test result(s), please contact us directly. A member of our team is on hand to help deal with your enquiry.

Product Reference Type
100
200
400
500
600
Property
Elastomer / Polymer type
Natural Rubber
Colour Black Tan Tan Red Dark Red
Length and Width mm 915 x 915 915 x 915 915 x 1000 915 x 1000 915 x 1000
Density (kg/M³) 480 480 450 560 640
Shore ‘A’
Shore ‘O’
Elongation at Break (%)
Tensile Strength (kPa)
Compression Deflection @ 25% (kPa) ASTM D1056 70 – 110 70 – 110 103 – 172 172 – 241 241 +
Compression Deflection @ 50% (kPa) ASTM D1056
Compression Deflection Change after Oven aging % ASTM D 1056 168hrs at 70 deg c
Compression Set (50% 22h) ASTM D1056-00 @ 23ºc
Compression Set (50% 22h) ASTM D1056-00 @ 40ºc
Compression Set (50% 70h) ASTM D3574 D @ 20ºc
Compression Set (50% 22h) ASTM D3574 D @ 70ºc 15 15 25 30 30
Water Absorbtion %
Tear Resistance (N/mm)
Temperature Range (ºC Low – High) -30 to 70 -30 to 70 -30 to 70 -30 to 70 -30 to 70
Temperature High Intermittent ºC
Resistance to Air and UV
Resistance to Oil
Resistance to Acids
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