Silicone Sponge Sheets
Key Features
- Closed-cell silicone sponge construction
- Smooth outer skin on both sides
- Extremely low water absorption
- Sealing performance up to IP67
- Wide temperature range: –60°C to +230°C (+250°C intermittent)
- FAR 25 / JAR 25 / CS 25 Appendix F flammability compliant
- Available in multiple densities and thicknesses
- Supplied in sheets or rolls on request
Product Description
Our silicone sponge sheets are engineered for demanding applications that require a soft, flexible, and easily pliable rubber material with superior sealing performance. Manufactured with a closed-cell structure and finished with a smooth outer skin on both sides, these sheets deliver exceptionally low water absorption, making them ideal for gasketing, sealing, thermal insulation, and environmental protection. The closed-cell silicone construction provides excellent resistance to moisture ingress and enables assemblies to achieve protection ratings of up to IP67, ensuring long-term reliability in harsh operating conditions.
Designed for high-performance environments, our silicone sponge rubber sheets operate across a wide temperature range from –60°C to +230°C, with intermittent exposure up to +250°C, making them suitable for aerospace, automotive, industrial, and electrical applications. The material also complies with stringent flammability standards, meeting FAR 25 / JAR 25 / CS 25 Appendix F, Part 1 horizontal flammability requirements, supporting use in safety-critical installations. Standard supply is 1m x 10m sheets in thicknesses from 1.5mm to 30mm, depending on sheet density. Rolls can be cut to size on request, offering flexibility for both prototype and production requirements.
The Rubber Company can supply silicone sponge sheets in four standard densities to suit a wide range of compression and sealing requirements:
• P10 – Soft: Ideal for low-load applications and light sealing requirements
• P16 – Medium: Suitable for general-purpose sealing and insulation
• P24 – Firm: Designed for applications requiring higher compression resistance
• P33 – Extra Firm: Recommended for demanding environments requiring maximum strength and durability
Specifications
| Application: | Environmental shields, electrical and automotive gaskets, seals, medial equipment |
| Product: | Silicone Sponge Sheeting |
| Density: | 200 - 530 kg/m³ |
| Material: | Silicone Sponge |
| Colour: | Black, White, Red Oxide |
Potential Applications
- Environmental shields
- Electrical and automotive gaskets
- Sealing applications
- Medial equipment
- Access panels
- Full rolls, strip cut lengths, gaskets and adhesive-backed
Technical Data
| Properties | P16 | P24 | P33 |
|---|---|---|---|
| Density | 250 kg/m | 400 kg/m | 550 kg/m |
| Hardness (Shore 00) | 42° ± 5° | 65° ± 5° | 80° ± 5° |
| Tensile Strength | 0.6 MPa | 0.7 MPa | 2.0 MPa |
| Elongation at Break | 145 % | 120 % | 130 % |
| Temperature Range | -60° C to +230° C | -60° C to +230° C | -60° C to +230° C |
| Colour | Black, White, Red Oxide | Black, White | White |
| Sheet Size | 1m x 10m | 1m x 10m | 1m x 10m |
| Sheet Thickness | 1.5mm to 30mm | 1.6mm to 15mm | 2mm to 6mm |
