Martin's Eraser Weed & Grass Killer concentrate. Low odor, water-based formulation. Rainproof in hours. Kills unwanted vegetation, existing weeds only. Replant flowers in 1 day, new lawns in 7 days after treatment. Kills annual weeds, perennial weeds, trees, vines, shrubs, cattails, water hyacinth, water primrose, and duckweed. Ideal for driveways, around the home, flower beds, gardens, vegetable gardens, lawn renovation, and edging. Active ingredient: Glyphosate.