RTV2040 Silicone elastomer Ambersil Silicones Rubber - Elastomer >> Silicone rubber SEALANT >> Foam RTV2040 Two Part Fire resistant Foam A two component silicone elastomer which cures within a few minutes to form a predominantly closed cell foam with outstanding flame retardant characteristics. Its main applications include fire barriers, fire retardant seals and joints, fire retardant damping and sound proofing and moulding resistant articles. Two component silicone elastomer which cures to form a predominantly closed cell foam. Used in fire resistant seals and joints. Offers outstanding flame retardant characteristics.