BISCO® 7304 Silicone Sponge
Rogers BISCO® 7304 Silicone Sponge is a medium-density, closed-cell silicone sponge material designed for high-performance gasketing, sealing, and thermal insulation applications. With its balance of softness and mechanical durability, BISCO 7304 provides flame resistance, temperature stability, and environmental resilience. It is ideal for use in aerospace, electronics, and outdoor enclosures where consistent performance and long-term reliability are critical. This material meets BMS 1-23 specifications and is supplied in convenient 36" × 36" sheets.
Applications include: Gap filling, gasketing and sealing, HEV enclosures, LCDs, shock absorbers, sound blocking, spacers and bin liners, and thermal solutions.
- Available in sheet format, in thicknesses from 1.59 mm to 25.4 mm (0.063" to 1.0")
| Property | Specification |
| Backing (Carrier) Material | Closed-cell medium firm silicone sponge |
| Adhesive Material | Optional Silicone or Acrylic PSA |
| Density (Metric) | 560 kg/m³ |
| Density (Imperial) | 35 lb/ft³ |
| Compression Force Deflection (kPa) | 41-96 kPa |
| Compression Force Deflection (PSI) | 6-14 psi |
| Compression Set (22 hrs. at 100°C/50%) | 5% |
| Water Absorption | <5% |
| Thermal Conductivity (K Value) | |
| Tensile Strength (kPa) | >1380 kPa |
| Tensile Strength (PSI) | 200 psi |
| Elongation at Break | >200% |
| Shielding Effectiveness (Average 300kHz - 2.5GHz) | |
| Product Color | Red |
| Dielectric Strength | |
| Volume Resistivity | |
| Insulation Resistance | |
| Certifications | FMVSS302, BMS 1-23 |
| Thickness (Imperial) | 0.063-1" |
| Thickness (Metric) | 1.59-25.4 mm |
| Maximum Operating Temperature (Celsius) | 232°C |
| Maximum Operating Temperature (Fahrenheit) | 450°F |
| Minimum Operating Temperature (Celsius) | -55°C |
| Minimum Operating Temperature (Fahrenheit) | -67°F |
