BioAdvanced 80230141 6 Month Prevention Barrier Glyphosate Herbicide DuraZone Weed & Grass Killer Non-Selective, 32-Ounce, Concentrate Keeps spaces clear of unwanted weeds and grasses for up to 6 months Kills all types of existing weeds and grasses Plus prevents new weeds and grasses from emerging For use on driveways, sidewalks, patios, along fences and foundations, and around walkways and mulched areas Treats 1500 sq ft