GLUEDEVIL GD7 general purpose silicone is a permanently flexible sealant that can be used to make waterproof seals for joints, gaps and cracks. Adheres to glass, painted or varnished surfaces, metals and most plastics. Ideal for sanitary, plumbing, roofing, cladding, ducting and most DIY applications. It forms a tough, waterproof rubber seal that can withstand temperature extremes from -50ºC to 120ºC. Colours available: GD7 GREY, GD7 BLACK, GD7 CLEAR, GD7 WHITE, GD7 BRONZE.