Dap 18368 DAP Blacktop and Roof 3.0 Sealant 9.0-Ounce An advanced sealant specially formulated with kwik Dry technology allowing it to be exposed to water and moisture after only three hours without washing out Ideal for repairing minor roof leaks, asphalt shingles, rolled asphalt roofing, corrugated metal roofing and sealing chimneys Use for sealing cracks in driveways, pavement, parking lots, playgrounds, and other asphalt surfaces Mold and mildew resistant Permanently watertight and weather tight