BISCO® BF-2000 – Ultra Soft
BISCO® BF-2000 is an ultra soft, highly compressible closed cell silicone foam engineered for applications requiring the lowest possible closure force combined with reliable environmental sealing. Rated from −67°F to 392°F, BF-2000 delivers 1.0 psi compression force deflection at 25% and meets UL 94 V-0 and HF-1 flame standards, making it the softest grade in the BISCO cellular foam family.
Key Properties
- Compression Force Deflection @ 25%: 1.0 psi (6.9 kPa) typical; spec <1.7 psi (12 kPa)
- Tensile Strength: ≥20 psi (140 kPa)
- Elongation: ≥60%
- Compression Set: Tested per ASTM D1056 (22 hrs @ 212°F, 50%)
- Density: 11 lb/ft³ (175 kg/m³)
- Recommended Service Temperature: −67°F to 392°F
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Material | Closed Cell Silicone Foam | — |
| Density | 11 lb/ft³ (175 kg/m³) typical | — |
| Thermal Conductivity | 0.048 W/m°K | ASTM C518 |
| Water Absorption | 1.4% | Internal (24 hrs, 2″ below surface) |
| Thicknesses Available | 0.125″, 0.188″, 0.250″, 0.375″, 0.500″ | — |
| Colors | Black | — |
Mechanical Properties
| Property | Value | Test Method |
| Compression Force Deflection @ 25% | 1.0 psi (6.9 kPa) typical; spec <1.7 psi (12 kPa) | ASTM D1056 |
| Compression Set (22 hrs @ 212°F, 50%) | Tested | ASTM D1056 |
| Tensile Strength | ≥20 psi (140 kPa) | ASTM D412 |
| Elongation (Minimum) | 60% | ASTM D412 |
Flame & Fire Performance
| Property | Value | Test Method |
| Flame Resistance | V-0 ; HF-1 | UL 94 (File E83967) |
| Flame Spread Index (Is) | <35, Flaming Mode | ASTM E162 |
| Smoke Density (Ds) @ 1.5 Minutes | <100, Flaming Mode | ASTM E662 |
| Smoke Density (Ds) @ 4 Minutes | <200, Flaming Mode | ASTM E662 |
| Burn Length | <100 mm/min | FMVSS 302 |
Thermal & Environmental Performance
| Property | Value | Test Method |
| Recommended Use Temperature | −67°F to 392°F (−55°C to +200°C) | Internal |
| Low Temperature Flexibility | Pass at −67°F (−55°C) / 3 min | ASTM D746 |
| Low Temperature Brittleness | Pass at −67°F (−55°C) / 5 hrs | ASTM D1056 |
| UV Resistance | Yes | — |
| Ozone Resistance | Yes | — |
Compliance
- UL 94 V-0 — Compliant (File E83967)
- UL 94 HF-1 — Compliant (File E83967)
- FMVSS-302 — Compliant
- Ultra-low closure force environmental seals for portable electronics
- LCD screen and touch panel gaskets in laptops and aircraft interiors
- Dust and moisture sealing in electronic enclosures
- Vibration isolation in electronic components and transportation vehicles
- Low closure force gap filling in assemblies with tight compressive load constraints
Common industries: electronics, transportation, aerospace interiors, HVAC, and consumer devices.
BF-2000 is the softest grade in the BISCO cellular silicone foam family — softer than BF-1000 — and is specifically designed for applications where the lowest possible closure force is required to achieve a reliable environmental seal. Its patented chemistry and cell structure deliver ultra-low compression force with excellent memory and minimal stress relaxation, supporting long-term seal integrity without gasket failure from compression set or softening.
BF-2000’s high compressibility allows it to conform to variable-width gaps and irregular mating surfaces, providing consistent sealing performance across a wide range of design tolerances. Its resistance to UV, ozone, and extreme temperature cycling makes it well-suited for electronics, transportation, and portable device applications. It meets UL 94 V-0 and HF-1 flame requirements.
Compliant with UL 94 V-0, UL 94 HF-1, and FMVSS-302.
What differentiates BF-2000 from other BISCO cellular foam grades? BF
BF-2000 is the softest grade in the BISCO foam family, delivering the lowest compression force deflection (1.5 psi typical at 25%) — softer than BF-1000. It is the preferred choice when minimal closure force is the primary design constraint.
Why is compression set critical?
Compression set measures long-term recovery after sustained compression. Lower values indicate better sealing force retention over the life of the application, reducing maintenance costs from gasket failure.
What is the operating temperature range?
−67°F to 392°F (−55°C to +200°C)
Is BF-2000 suitable for regulated environments?
Yes. BF-2000 meets UL 94 V-0 and HF-1 flame ratings and FMVSS-302, making it suitable for electronics and transportation applications with flame performance requirements.
How should this material be specified?
Specify grade (BF-2000), thickness, compliance requirements, dimensional tolerances, and finished format. Note: available in Black only.
