BISCO HT-820 Firm Cellular Silicone is a firm grade silicone foam that provides enhanced durability and sealing. HT-820 foam offers a higher tear and tensile strength than our lighter grade foams. This material is designed for use in enclosures requiring a more durable, high closure force gasket. HT-820 foam is ideal for sealing and protecting outdoor communication, lighting and electronic enclosures from small dust particles, wind-driven rain and fire.
Features
- Compact cell structure offers enhanced sealing performance
- Available in thicknesses from 0.031 to 0.250 in.
- Typical density of 24 PCF
- CFD range of 12-20 PSI
- Resistant to UV, ozone, extreme temperatures and flame
Benefits
- Excellent memory and low stress relaxation
- Enhanced sealing performance
- Offers consistent performance in all environments
- Reduces maintenance costs associated with gasket failures due to compression set and softening
| PROPERTY | TEST METHOD | VALUE |
| Color | Visual | Gray |
| Thickness, mm (inches) |
Internal | 0.79 – 12.70 (0.031 – 0.500) |
| Density, kg/m3 (lb./ft3) | Internal | 384 (22) |
| Compression Force Deflection, kPa (psi) | ASTM D1056 | 106 (15.3) |
| Compression Set, % max. | ASTM D1056 100°C (212°F) / 22 hrs / 50% |
2.6 |
| Water Absorption, % | Internal 2″ below water surface / 24 hrs /change in weight | 0.5 |
| Temperature Range, °C (°F) | Internal | -55 to +200 (-67 to +392) |
| Thermal Conductivity, W/m °K | ASTM D518 | 0.09 |
