Silicone sponge sheeting is extremely heat resistant and nonstick. It is also resistant to UV radiation, ozone, and the majority of mild and oxidising chemicals. It emits little smoke and fumes and is widely used in a variety of sealing applications. Silicone Sponge Sheeting – FDA Approved is also available, as is Silicone Sponge Sheeting – HT800, which is both FDA approved and flame retardant. By following the link above, you can purchase silicone sponge sheets from Petron Thermoplast.