Provides a durable, flexible and watertight/weatherproof bond for gutters, drain spouts, lap joints, flashing, roof vents, aluminum siding and other metal joints. Cures with minimal shrinkage. Tack free in 12-24 hours. Adheres tightly to aluminum, steel, galvanized bonderized surfaces, wood, concrete, plastics, vinyl, rubber and painted surfaces. Stands up to weather and temperature extremes. Meets ASTMC-1311.