KleenUp® 41% Weed & Grass Killer ConcKleenUp is designed for systemic control over a wide variety of weeds and grasses. Made with 16. 5% glyphosate, this product is effective on broadleaf and grassy types of weed. With just one quart, you can treat up to 6,300 square feet. Kills grasses, weeds, and brush down to the root Safe to reseed treated area in just 7 days Can also be used to kill tree stumps and vines Kills nearly any vegetation down to the root 41% SUPER concentrate Concentrate