Silicone Foam and Sponge
Liqid based Silicone Foam, and gum based Silicone Sponge have combined properties of resilience, high temperature stability and general inertness unavailable in other foam or sponge sealing materials. They are generally unaffected by extended exposure to temperature extremes from -67°F (-55°C) to 392°F (200°C), and are also unaffected by aging and degradation from sunlight and ozone.
Silicone foam is typically lighter in density, compresses with less force and has a lower compression set than silicone sponge. Sponge has higher tensile strength and the foam has better flame resistance.