TriRoof Overlay system is one of the most advanced systems on the market guaranteed to give you a lasting, watertight roof surface. It will adhere to Asphalt, Concrete, Felt, and GRP. It is a cold applied system. A primer is applied first followed by a layer of 225g matting and finally a TriRoof MultiFlex Resin. The Resin is coloured which gives the roof its watertight finish. The Catalyst supplied with this system is powdered and measured out in scoops. It is suitable for application in temperatures as low as 1°C (with winter accelerator) or as high as 30°C.