Silicone Foam
BISCO® HT-820 Firm Cellular Silicone Foam
Overview
BISCO® HT-820 is a firm-grade, closed-cell silicone foam engineered for robust sealing performance closely matching that of sponge rubber. Its proprietary formulation and compact cell structure deliver long-term compression recovery, enhanced tear strength, and reliable seals—making it the ideal choice for demanding environments like outdoor enclosures that must withstand dust, rain, UV, flame, and fluctuating temperatures.
Features
- Firm density (~24 lb/ft³ / 384 kg/m³) delivers a strong, durable profile
- High compression force (12–20 psi / 82–138 kPa at 25% deflection) ensures tight sealing
- Exceptional compression set resistance (<1% at 70 °C; <5% at 100 °C) maintains performance over time
- UL 94 V-0 flame rating, offering top-tier fire safety
- Wide temperature tolerance: –55 °C to +200 °C (–67 °F to 392 °F) for versatile use
- Resistant to UV, ozone, and environmental wear, ensuring long-term durability
- Low water absorption (<0.5%) supports reliable sealing in wet conditions
- Manufacturing flexibility: offered in rolls, sheets, or custom die-cut parts
Benefits
- Maintains effective sealing and cushioning over repeated compression cycles
- Delivers dependable, high-performance seals across extreme and outdoor environments
- Combines foam-light weight with sponge-strength sealing capabilities
- Supports smooth yields in fabrication and consistent part quality
Applications
- Environmental gasketing for outdoor communication, lighting, and electronics enclosures
- Sealing in HVAC and architectural installations exposed to elements
- Shock and vibration isolation in industrial and transport systems
- High-reliability sealing in regulatory-sensitive applications where flame safety is required
Why Choose BISCO® HT-820?
- Engineered for durability: Combines firm support with lasting foam resilience
- Safe and reliable in harsh conditions: UV, flame, and temperature resistance
- Excellent manufacturing compatibility: Easily processed into custom parts
- Outstanding long-term performance: Compression integrity and material strength endure
Data Sheets
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