Spectracide One-Shot 32 Oz. Concentrate Weed & Grass Killer delivers fast-acting and long-lasting control for unwanted vegetation on hardscapes. This powerful, glyphosate- formula effectively kills broadleaf and grassy weeds down to the root, preventing regrowth for up to five months. You can expect visible results on the same day, and the solution becomes rainproof in just one hour. Designed for easy mixing and spraying, it is for use on patios, walkways, and driveways, providing maximum control for tough weed and grass problems. Please avoid using it on or near desirable plants, edible crops, or pets during application. Model Number: HG-97188