For windows, siding, gutter and roof application. Flexible in hot and cold weather. Superior adhesion characteristics. Easy extrusion in cold weather. Paintable when cured. Adheres without a primer to most common substrates like aluminum, brick, wood, concrete, vinyl, plastics, glass, etc. Meets federal specification TT-S-001657, type I, TT-S00230C, and ASTMC 920: Type S, Grade NS, Use NT.