| Silicone Rubber Extrusion | Delayed | 25 working days |
| Silicone Extrusion & Secondary Operations | Delayed | 30 working days |
| Silicone Rubber Extrusion (New Dies) | Delayed | 30 working days |
| Silicone Rubber Inflatable Seals | Delayed | 22 working days |
| Silicone Rubber & Sponge Sheeting | Normal | from 5 working days |
| Silicone Rubber & Sponge Gaskets | Normal | from 5 working days |
| EPDM Extrusion | Normal | 3 - 5 Weeks |
| Compression Moulded Parts | Partially Delayed | From 4 Weeks |
| 3D Printed Parts | Normal | 5 Working Days |
Lead times are indicative and subject to current capacity. Contact us for an accurate quote →
Our silicone products are proudly manufactured at our West Sussex, UK facility.
We ship worldwide via trusted courier partners with full tracking and insurance available on all orders.
UK Delivery: Next-day and economy options available
Europe: 2–4 working days
Rest of World: 3–7 working days
Product Codes: BISCO HT-800SH, BISCO HT-820SH, BISCO HT-840SH
BISCO® HT800-840 are medium to extra-firm grades of silicone sponge. They are highly versatile and suitable for sealing and protecting communication, electronics and lighting enclosures in outdoor environments. These materials have excellent memory and low stress relaxation which reduces maintenance costs associated with gasket failure caused by compression set and material softening. The compact cell structure of BISCO® HT-800 – HT-840 grades provide exceptional sealing performance against penetration from wind-driven rain, fire and fine particles. They also offer exceptional vibration isolation and shock reduction in transportation vehicles and electronic components.
| HT-800 Nominal Thickness | HT-800 Tolerance | HT-820 Nominal Thickness | HT-820 Tolerance | HT-840 Nominal Thickness | HT-840 Tolerance |
|---|---|---|---|---|---|
| mm (inches) | mm (inches) | mm (inches) | mm (inches) | mm (inches) | mm (inches) |
| 0.79 (0.031) | ± 0.381 (± 0.015) | 0.79 (0.031) | ± 0.381 (± 0.015) | ||
| 1.60 (0.063) | ± 0.508 (± 0.020) | 1.60 (0.063) | ± 0.508 (± 0.020) | 1.60 (0.063) | ± 0.508 (± 0.020) |
| 2.39 (0.094) | ± 0.508 (± 0.020) | 2.39 (0.094) | ± 0.508 (± 0.020) | 2.39 (0.094) | ± 0.508 (± 0.020) |
| 3.18 (0.125) | ± 0.635 (± 0.025) | 3.18 (0.125) | ± 0.635 (± 0.025) | 3.18 (0.125) | ± 0.635 (± 0.025) |
| 4.78 (0.188) | ± 0.635 (± 0.025) | 4.78 (0.188) | ± 0.635 (± 0.025) | 4.78 (0.188) | ± 0.635 (± 0.025) |
| 6.35 (0.250) | ± 0.762 (± 0.030) | 6.35 (0.250) | ± 0.762 (± 0.030) | 6.35 (0.250) | ± 0.762 (± 0.030) |
| 9.53 (0.375) | ± 1.143 (± 0.045) | ||||
| 12.70 (0.500) | ± 1.270(± 0.050) |
| Property | Unit | HT-800 Typical Value | HT-800 Specification | HT-820 Typical Value | HT-820 Specification | HT-840 Typical Value | HT-840 Specification | Test Method |
|---|---|---|---|---|---|---|---|---|
| Colour | Black; Grey; Red | – | Grey | – | Grey | – | Visual | |
| Density | kg/m³ (lb/ft³) | 352 (22) | 300-473 (18.7 – 29.5) | 384 (22) | 336 – 528 (21 – 33) | 448 (28) | 369-553 (23.7 – 34.5) | Internal |
| Compression Force Deflection | kPa (PSI) | 67 (9.7) | 41 – 97 (6 – 14) | 106 (15.3) | 82 – 138 (12 – 20) | 110 – 179 (16 – 26) | ||
| Compression Set | % | 2.4 | <5 | 2.6 | <5 | <5 | ASTM D1056 100ᵒC (212ᵒF)/22hrs/50% | |
| Water Absorption | % | 0.5 | <5 | 0.5 | <5 | <5 | Internal 2” below water surface /24 hrs/ change in weight |
These figures are only intended as a guide and should not be used in preparing specifications.
| Property | Unit | HT-800 Typical Value | HT-800 Specification | HT-820 Typical Value | HT-820 Specification | HT-840 Typical Value | HT-840 Specification | Test Method |
|---|---|---|---|---|---|---|---|---|
| Flame Resistance | – | Meets | V-0 | Meets | V-0 | Meets | V-0 | UL 94 (File E83967) |
| Flame Spread Index | Ls | Meets | Flaming Mode <35 | Meets | Flaming Mode <35 | Meets | Flaming Mode <35 | ASTM E162 |
| Smoke Density | Ds | Meets | Flaming Mode; 1.5min <100 / Flaming Mode; 4.0 min < 200 | Meets | Flaming Mode; 1.5min <100 / Flaming Mode; 4.0 min < 200 | Meets | Flaming Mode; 1.5min <100 / Flaming Mode; 4.0 min < 200 | ASTM E662 |
| Burn Length | – | Meets | <100mm/min | Meets | <100mm/min | Meets | <100mm/min | FMVS 302 |
These figures are only intended as a guide and should not be used in preparing specifications.
| Property | Unit | HT-800 Typical Value | HT-800 Specification | HT-820 Typical Value | HT-820 Specification | HT-840 Typical Value | HT-840 Specification | Test Method |
|---|---|---|---|---|---|---|---|---|
| Flame Resistance | – | Meets | V-0 | Meets | V-0 | Meets | V-0 | UL 94 (File E83967) |
| Flame Spread Index | Ls | Meets | Flaming Mode <35 | Meets | Flaming Mode <35 | Meets | Flaming Mode <35 | ASTM E162 |
| Smoke Density | Ds | Meets | Flaming Mode; 1.5min <100 / Flaming Mode; 4.0 min < 200 | Meets | Flaming Mode; 1.5min <100 / Flaming Mode; 4.0 min < 200 | Meets | Flaming Mode; 1.5min <100 / Flaming Mode; 4.0 min < 200 | ASTM E662 |
| Burn Length | – | Meets | <100mm/min | Meets | <100mm/min | Meets | <100mm/min | FMVS 302 |
These figures are only intended as a guide and should not be used in preparing specifications.
| Property | Unit | HT-800 Typical Value | HT-800 Specification | HT-820 Typical Value | HT-820 Specification | HT-840 Typical Value | HT-840 Specification | Test Method |
|---|---|---|---|---|---|---|---|---|
| Total Mass Loss | % | 0.98 | – | 2.11 | – | 2.08 | ASTM E595 (4×10⁻⁶ Torr) | |
| Collected Volatile Condensable Materials (CVCM) | % | 0.25 | – | 0.63 | – | 0.57 | ASTM E595 (4×10⁻⁶ Torr) | |
| Water Vapor Regain | % | 0.03 | – | 0.02 | – | 0.01 | ASTM E595 (4×10⁻⁶ Torr) |
These figures are only intended as a guide and should not be used in preparing specifications.
| Property | Unit | HT-800 Typical Value | HT-800 Specification | HT-820 Typical Value | HT-820 Specification | HT-840 Typical Value | HT-840 Specification | Test Method |
|---|---|---|---|---|---|---|---|---|
| Dielectric Strength | Volts/mil | 75 | – | 66 | – | 57 | – | ASTM D149 |
| Dielectric Constant | 1 kHz | 1.7 | – | 1.7 | – | 1.8 | – | ASTM D150 |
| Dissipation Factor | 1kHz | 0.005 | – | 0.006 | – | 0.006 | – | ASTM D495 |
| Dry Arc Resistance | Seconds | 125 | – | 174 | – | 149 | – | ASTM D495 |
| Volume Resistivity | Ω·cm | 10¹⁴ | – | 10¹⁴ | – | 10¹⁴ | – | ASTM D257 |
These figures are only intended as a guide and should not be used in preparing specifications.
Contact out experienced team of technical advisors for advice, quotations or any other queries.
Required fields are marked with*
Close
We ship our goods worldwide using a variety of couriers including DPD, DHL, TNT, UPS and FEDEX. Please contact us to discuss your shipping requirements.
Close
We ship our goods worldwide using a variety of couriers including DPD, DHL, TNT, UPS and FEDEX. Please contact us to discuss your shipping requirements.