Roundup 35.2 oz. Concentrate Super Weed & Grass Killer. It is the economical, effective way to handle larger areas. Use around flowers, shrubs and trees, on patios, walkways, driveways, gravel areas and mulch beds, along fences, edging and foundations. It is also effective on large areas such as lawn replacements or garden plot preparation. For best results, add 2.5 fl. oz. of the concentrate to 1 gallon of water in a Roundup Brand Premium Sprayer. The formula is rainproof in 30 minutes, and you can see results fast as weeds usually yellow and wilt in 2-4 days. Active ingredient: 50.2% Glyphosate. Comes in a bottle.