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Silicone Sponge Extrusions

Silicone Sponge Extrusions

Silicone sponge extrusions provide the performance characteristics of silicone rubber in a lightweight, compressible sponge form — ideal for sealing, cushioning and thermal applications where flexibility and temperature resistance matter....
CALL CRYSTAL RUBBER FOR A QUOTE

Pricing & availability on request — share sizes, grade & quantity for a fast quote.

Fast UK Delivery

We use various UK couriers for all our UK based shipping and delivery.

Materials & Grading

We supply our materials from our factory in a range of gradings and material. Check the product description below for more information.

Bespoke sizes available

We offer various lengths and widths and can cut to size on request. Call us on 01925 825552.

Need help or assistance?

We're here to help if you have any questions. Call us on 01925 825552.

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Silicone sponge extrusions provide the performance characteristics of silicone rubber in a lightweight, compressible sponge form — ideal for sealing, cushioning and thermal applications where flexibility and temperature resistance matter.

Available Sections & Profiles

  • Tubes
  • Seals
  • ‘U’ sections
  • ‘T’ sections
  • ‘e’ sections
  • ‘D’ sections
  • ‘P’ sections

Sponge strip can also be extruded or slit from sheet for simple widths and thicknesses. 

Standard Densities

Four standard grades are held/available, with typical apparent densities:

Grade Imperial (lb/ft³) Metric (kg/m³)
SIL10 10 ≈200
SIL16 16 ≈250
SIL24 24 ≈400
SIL33 33 ≈550

Intermediate densities and special grades can be produced to suit your application. 

Material Options

  • High temperature grades up to 270 °C
  • Metal-detectable sponge (typically grey)
  • FDA compliant: SIL20 FDA platinum-cured sponge (conforms to FDA 177.2600 and EC 1935/2004)
  • Wide choice of colours

Contact us for technical data sheets and colour availability.

Typical Applications

  • Door and panel seals
  • Thermal insulation and gasketing
  • Vibration damping & cushioning
  • Food, pharma and process equipment (FDA grades)

Ordering & Pricing

Made to order in standard profiles or custom dies (simple and cost-effective to manufacture), allowing freedom in design. Lead times and MOQs vary by profile. 

Pricing on request. Please call +44 (0)1925 825552 or get in touch with your sizes, grade and quantity for a fast quote.