Roundup, 36.8 OZ, Concentrate, Weed & Grass Killer Plus, Kills the toughest weeds and grasses to the root. For use in a tank sprayer. For use around flowers, shrubs and trees; on patios, walkways, driveways, gravel areas and mulch beds; along fences, edging and foundations; as well as areas such as lawn replacements or garden plot preparation. Rainproof in 30 minutes. Visible results in 12 hours with FastAct Technology. Not for use around existing edibles. Active ingredients: Glyphosate 18%; Diquat 0.73%.