Foam is a type of rubber that is made up of tiny air bubbles and is often used for insulation, padding, and cushioning. Silicone rubber is a synthetic rubber that is resistant to extreme temperatures and is often used in medical and automotive applications. Butyl rubber is a synthetic rubber that is highly impermeable and is often used in tire inner tubes and other products that require an airtight seal. Para rubber is a natural rubber that is derived from the sap of the Hevea brasiliensis tree and is often used in tires and other rubber products. LATEX rubber is a natural rubber that is derived from the sap of the rubber tree and is often used in gloves, condoms, and other products.