A silicone system for draught proofing steel frame windows has been developed by our company and has been successfully applied to many properties such as schools and commercial buildings.

Firstly the windows are serviced so that they open and close properly. We then apply a coat of metal enamel paint to the rebate, liquid silicone is then applied to the rebate of the window frame and a release agent is coated to the opening sash. The sash is then closed and any excess silicone trimmed off and left till the silicone has cured. After curing the sash is opened and the cured silicone has bonded to the rebate creating a gasket, but due to the release agent the silicone has not bonded to the opening sash. This creates a variable thickness seal to match the gap between opening sash and frame.