Dap 18816 Polyurethane Roof and Flashing Sealer, 10.1-Ounce
A one-part, moisture-curing, commercial grade sealant. Specially formulated to provide a permanent, waterproof seal when filling exterior gaps, joints and cracks. This high performance sealant offers superior adhesion to a variety of substrates and remains permanently flexible. Paintable. 50 year durability guarantee. Meets or exceeds Federal Spec TT-S 00230C, Type II, Class A and ASTM C 920, Type S, Grade NS, Class 25. Ideal for use on doors, windows, sidings, ducts and vents.