The Siroflex SX Contractors LMN Silicone OAK 300ml is a one component neutral cure sealant. Use it on aluminium, unplasticised plastics such as polyester, rigid polystyrene, ABS, most PVCu, and most painted wood. It can seal building joints and for perimeter pointing around most types of window and door frames. This silicone is almost odourless and cures with atmospheric moisture to form a durable rubber seal.