Doff Super Strength Glyphosate Weedkiller Concentrate kills weeds down to the root. It is supplied in pre-measured sachets, meaning that no measuring is required. The weedkiller is ideal for the control of annual and perennial weeds on paths, patios, drives and wasteland and suitable for sprayer application. Contains: 72g/l Glyphosate. Pack size: 10 sachets (pre-measured). Each sachet covers 32sqm.