Closed Cell Silicone Sponge Sheet 20-25 Shore A, 0.8-50mm Thickness

Price Negotiable

Price: USD6.00/kg

MOQ: 100kgs

Delivery Time: 7-15days

Brand: 3A Rubber

Product Description

Closed Cell Silicone Sponge Sheet 20-25 Shore A, 0.8-50mm Thickness

A high-performance sealing material with excellent temperature resistance and impermeable closed-cell structure.

Product Specifications

Material	Virgin silicone sponge, silicone foam
Cell Structure	Close cell
Available Colors	Red, white, grey, black, beige, brown, blue, etc.
Surface Finish	Double impression fabric, smooth
Tensile Strength	100-200PSI
Hardness	5, 10, 15, 20, 25, 30, 35, 40+/-5 shore A (currently 20-25 shore A)
Elongation	100%
Density	0.35-1.00g/cm³
Temperature Range	-40°C to +220°C (momentary maximum 260°C)
Standard Sizes	0.8-50mm * 1.0m * 10m 0.8-50mm * 1.2m * 10m 5.0-50mm * 1.5m * 10m

Closed-Cell Silicone Sponge Sheet Features

Waterproof & Airtight Seal: Excellent barrier against moisture, air, dust, and many gases
Low Compression Set: Maintains sealing force and returns to original shape after compression
High-Temperature Resistance: Continuous range from -60°C to 200°C (-76°F to 392°F)
Environmental Resistance: Withstands weathering, UV radiation, ozone, and many chemicals
Flame Retardant: Meets UL 94 V-0 standards for electrical and transportation uses
Buoyant: Naturally floats due to sealed-cell structure

Key Selection Parameters

Thickness: 0.8mm (1/32") to 12mm (1/2") or more
Density: 15 to 35 lbs/ft³ (pcf)
Firmness: Asker C 10 (very soft) to Asker C 40 (firm)
Compression Force Deflection (CFD): Critical for seal design and closure force calculations
Curing Types:
- Peroxide-Cured: Standard industrial grade
- Platinum-Cured: For medical, food contact, and high-purity applications

Common Applications

Environmental Sealing: Outdoor LED lighting, electrical cabinets, HVAC systems, automotive/aerospace
EMI/RFI Shielding: When laminated with conductive materials
Thermal Insulation: High-temperature pipe and fitting insulation
Cushioning & Damping: Vibration damping for sensitive equipment

Material is typically die-cut into custom gaskets or available in rolls/sheets for fabrication. Often comes with pressure-sensitive adhesive (PSA) backing for easy installation.