Silicone Sponge
Silicone sponge, or closed cell silicone sponge, is derived from a thin sheet of uncured silicone gum. The silicone gum compound is mixed with pigment and other ingredients during a rigorous mixing process. The still uncured silicone is then rolled into thin sheets and heat cured in a high temperature press or similar procedure.
At this point in the process, the silicone expands. The product is then often submitted to an additional four hour post-curing process at 480°F in a hot-air, circulating oven to enhance the compression set properties and reduce the incidence of out-gassing in the final assembly.
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