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

Categories Industrial Rubber Sheet
Brand Name: 3A Rubber
Model Number: 3A1002
Certification: ISO9001
Place of Origin: China
MOQ: 100kgs
Price: USD6.00/kg
Payment Terms: L/C,T/T,D/P,Western Union,MoneyGram
Supply Ability: 100000kgs/month
Delivery Time: 7-15days
Packaging Details: packing in rolls and pallets
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Closed Cell Silicone Sponge Sheet 20-25 Shore A, 0.8-50mm Thickness

Close Cell Silicone Sponge Sheet

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

Product Specifications
MaterialVirgin silicone sponge, silicone foam
Cell StructureClose cell
Available ColorsRed, white, grey, black, beige, brown, blue, etc.
Surface FinishDouble impression fabric, smooth
Tensile Strength100-200PSI
Hardness5, 10, 15, 20, 25, 30, 35, 40+/-5 shore A (currently 20-25 shore A)
Elongation100%
Density0.35-1.00g/cm³
Temperature Range-40°C to +220°C (momentary maximum 260°C)
Standard Sizes0.8-50mm × 1.0m × 10m
0.8-50mm × 1.2m × 10m
5.0-50mm × 1.5m × 10m
Closed-Cell Silicone Sponge Sheet Features

A compressible foam material with completely sealed gas-filled cells, created through specialized expansion and curing processes of silicone rubber. This structure provides exceptional impermeability to air and water.

  • 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.
Close cell silicone sponge sheet sample Silicone foam sheet in various thicknesses Industrial application of silicone sponge gasket Custom die-cut silicone sponge parts
Buy Closed Cell Silicone Sponge Sheet 20-25 Shore A, 0.8-50mm Thickness at wholesale prices
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