Martin’s Eraser Weed & Grass Killer is concentrated for extra value. Low odor water-based formulation. Rainproof in hours. Kills unwanted vegetation – existing weeds only. Replant flowers in one day, new lawns in 7 days after treatment. One quart makes up to 21 gallons. Use Sites: outdoors, driveway, around home, flower beds, gardens, vegetable gardens, lawn renovation, edging. Effective Against: annual weeds, perennial weeds, trees, vines, shrubs, cattails, water hyacinth, water primrose, duckweed. Ingredients: 41% Glyphosate.