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PORON 4790-92 Silicone Sponge

27118 is a highly versatile medium firmness Silicone offering the lightness of a foam with the sealing capabilities of a traditional Sponge Rubber.  Use to seal against penetration of dust, moisture, air and light within indoor or outdoor enclosures, such as lighting and electronics and Heating Ventilation and Air Conditioning. This product has, Excellent Memory and low stress relaxation,  Good Resistance to Ultraviolet light, ozone, extreme temperatures and flame, FDA Compliance in accordance with FDA Regulation 21 CFR 177.2600

Is available in 0.8mm - 12.7mm with a standard width of 914mm

Compression Deflection
62 Kpa
Compression Deflection
62 Kpa
Compression Set
<1 %
Compression Set
<1 %
Density
352 Kg/m3
Density
352 Kg/m3
Dielectric Constant
1.42  
Dielectric Constant
1.42  
Dielectric Strength
3583 kV/m
Dielectric Strength
3583 kV/m
Elongation at Break
80 %
Elongation at Break
80 %
Flame Resistance
V-0 & HF-1  
Flame Resistance
V-0 & HF-1  
Flame Spread Index(ls)
<25  
Flame Spread Index(ls)
<25  
Highest Recommended Working Temperature
200 °C
Highest Recommended Working Temperature
200 °C
Lowest Recommended Working Temperature
-55 °C
Lowest Recommended Working Temperature
-55 °C
Smoke Density(Ds) @ 4 Minutes
<50  
Smoke Density(Ds) @ 4 Minutes
<50  
Smoke Density(Ds) @ 1.5 Minutes
<20  
Smoke Density(Ds) @ 1.5 Minutes
<20  
Tensile Strength
310 Kpa
Tensile Strength
310 Kpa
Thermal Conductivity
0.09 W/m.K
Thermal Conductivity
0.09 W/m.K
Toxic Gas Emmissions
Pass  
Toxic Gas Emmissions
Pass  
Water Absorption
1.4 %
Water Absorption
1.4 %
PURPOSES
Electrical Insulation
Flame Retardent
Low Working Temperature
FDA Approved
REACH Compliant