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Silex offers a comprehensive range of cellular silicone sheets in both sponge and foam grades.

Sponge is used to describe a mostly closed cellular structure and as such has an exceptionally low water absorption. This can allow the products to reach up to IP Class 67. The term foam is applied when the structure is more open, allowing for superior recovery to its original state after compression.

Our standard silicone sponge sheets are finished smoothly on both sides and delivered in 1m rolls of up to 10m in length and up to 35mm thick. Sheets with a thickness of 15mm plus are more usually supplied in a 1m x 1m format. Standard colours include, but are not limited to: white, black, red oxide, blue and grey. 

Speciality silicone sponges, including high-recovery, fluorosilicone and thermally conductive grades, are available in 915mm x 915mm sheets. Further sponges are available in 915mm- wide roll format .depending on the particular grade. These sponges have a fine fabric finish on both sides and their respective colours vary depending on the end product designation.

In addition to the Silex Silicone sponge sheeting range we also offer flame retardant, ultra- low compression- set sponges and foams from The Rogers Bisco® brand.

All of our silicone sponges are available with plain or adhesive backing, and can be supplied in sheet form or converted into strips, gaskets or fabrications.

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  • BF1000 Flame Retardant Silicone Sponge Sheet

    BF1000 flame retardant silicone foam sheeting (extra-soft density). The softness of this sponge allows less force to be used to seal enclosures while still providing protection. 

    This is an ideal choice…

  • BF2000 Flame Retardant Silicone Sponge Sheet

    BF2000 ultra-soft flame retardant silicone foam. The softness of this sponge allows less force to be used to seal enclosures while still providing protection. This is an ideal choice for…

  • HT800 Flame Retardant Silicone Sponge Sheet

    HT800 offers the lightness of a sponge combined with the superior sealing capabilities of traditional silicone. This foam is ideal for protecting and sealing outdoor communication, electronics and lighting enclosures….

  • HT820 Flame Retardant Silicone Sponge Sheet

    HT820 flame retardant silicone sponge sheeting (firm density). Boasting higher tear and tensile strength than lighter grade foams, this product offers superior durability and sealing. 

    It has excellent memory and low…

  • HT840 Flame Retardant Silicone Sponge Sheet

    HT840 flame retardant silicone sponge sheeting (extra-firm density). This grade offers excellent sealing and durability with a higher tear and tensile strength than lighter grades. 

    Its memory and low stress relaxation…

  • HT870 Flame Retardant Silicone Sponge Sheet

    HT870 flame retardant silicone sponge (soft density). The softness of this sponge allows less force to be used to seal enclosures while still providing protection. This is an ideal choice…

  • SIL-X-300-FFF High Recovery Silicone Sponge Sheet

    High recovery, silicone rubber sponge sheet with a fine fabric finish on both sides, in red oxide or black. SIL-X-300-FFF is a predominantly closed cell sponge, with a fine, fabric…

  • SIL-X-600-FFF Thermally Conductive Silicone Sponge Sheet

    SIL-X-600-FFF is a thermally conductive, closed cell, silicone rubber sponge with a fine fabric finish. Offering thermal conductivity and electrical isolation, it is ideal for gasketing and cushioning applications requiring…

  • SIL-X-700-FFF Fluorosilicone Sponge Sheet

    Fluorosilicone sponge sheet with a fine fabric finish in blue. This sheet is supplied in 914mm wide sheets and is available in thicknesses from 0.8mm to 3.2mm. 

    SIL-X-700-FFF is a closed…

  • SIL16 High Temperature Sponge Sheeting

    Medium density (250kg/m3) silicone rubber sponge sheeting.  

    This sheeting is suitable where a soft, easily pliable rubber is required. High temperature seals and gaskets are examples of potential uses. These sheets…

  • SIL16 Silicone Sponge Sheet

    Medium density (250kg/m3) silicone rubber sponge sheeting. 

    Suitable where a soft, easily pliable rubber is required. These sheets perform at temperatures from -60°C to + 230°C, +250°C intermittently. MVQ SIL16 meets…

  • SIL20 FDA Sponge Sheeting

    SIL20 FDA silicone sponge sheeting is a medium density, mainly closed-cell silicone sponge available in white. This platinum cured material conforms to FDA 177.2600 and EC 1935/2004 standards. 

    Commonly used in…