Professional quality water repellent sealing compound. Stops roof leaks instantly. Provides long lasting protection. Features a special blend of refined asphalts and adhesion promoters designed to bond rapidly to moist, damp, wet or dry surfaces. Trowel grade, easy to use. Flexible seal prevents cracking. Fiber reinforced. For commercial and residential use. Used on flashings, vents, skylights, metal joints, seams, copings, and chimneys. 10 year protection. Black. Size 1 gallon can. Made in the USA.