Protects And Repairs Works Effectively Waterproof And Flexible Dow Sil Sealant Is A Fast Curing High Performance, Acetic Cure Silicone Sealant For Professional Trade Application. It Adheres To Glass, Ceramic, Fiberglass, Aluminum And Many Other Non-Porous Building Materials. It May Be Used To Glaze And Waterproof For Windows, Doors, Shopfronts, Internal Fixture And Fittings, Skylights.