Instant gasket clear RTV Silicone sealant D203. Hi modulus, acetoxy, pure silicone sealant. cures quickly by reaction with atmospheric moisture, gives a tough, durable and permanently flexible seal. Resistant to transmission fluids, water and antifreeze. Excellent chemical resistance and high electrical resistance. Specially designed for industrial and automotive applications, conforms to BS 5889 (B) ISO 11600. Uses: Industrial and engineering applications, gasket sealing replacing pre-formed gaskets, sealing of electrical cabinets, metal to metal and metal to glass expansion joints, general waterproofing and sealing.