Roundup 5109010 Weed and Grass Killer III Ready-to-Use Comfort Wand Sprayer, 1.10-Gallon, 141 Fl Oz. Kills the toughest weeds and grasses to the root. Guaranteed! (Consumer Guarantee: If for any reason you are not satisfied after using this product, simply send us original proof of purchase and we will replace the product or refund the purchase price.) Convenient, no-mix formula Use in and around vegetable gardens, flower beds, tree rings and mulched beds, as well as on cracks in driveways, walkways and patios Rainproof in 10 minutes Visible results in 3 hours