Spectracide Vegetation Killer Concentrate3, 32-Ounce CONTROLS PLANT GROWTH UP TO ONE YEAR: Use on driveways, patios and sidewalks to control unwanted weeds and grass. CONCENTRATE FORMULA: Mix and apply at the rates listed on the label. FAST ACTING: Treat uniformly to maximize results. RAINPROOF: Rain or watering one hour after application wont reduce effectiveness. COVERAGE: 1 gallon container covers up to 300 sq ft; 32 ounce container covers up to 75 square feet.