BISCO HT-840 Extra Firm Cellular Silicone is a very firm grade silicone foam that offers superior sealing capabilities. HT-840 silicone provides a higher tear and tensile strength than our lighter grade foams. HT-840 silicone is designed for use in enclosures requiring a more durable, high closure force gasket. This material is also ideal for use in press pads requiring greater conformability and even pressure distribution at high temperatures. HT-840 silicone is a great choice for sealing and protecting outdoor communication, lighting and electronic enclosures from small dust particles, wind-driven rain and fire.
Please see below for a sampling of data for this material formulation. For detailed material information and to use advanced features such as filtering, visit the BISCO® Product Properties Guide.
| HT-820 | HT-840 | |
|---|---|---|
| Minimum Thickness (mm) | 0.79 | 1.59 |
| Maximum Thickness (mm) | 6.35 | 6.35 |
| Density (kg/m3) | 384 | 448 |
| Compression Force Deflection (kPa) | 106 | 142 |
| Compression Set (%) | <5 | <5 |
| Water Absorption (%) | 0.5 | 0.5 |
| UL94 V-0 (Pass/Fail) | Pass | Pass |
| UL94 HF-1 (Pass/Fail) | Pass | Pass |
| Min Operating Temp (°C) | -55° | -55° |
| Max Operating Temp (°C) | 200° | 200° |
View current applications of this product.
