Gallon, Concentrate Kleen-Up. Contains 41% Glyphosate plus Surfactant. Kills weeds, and grass fast, but allows reseeding in 10 days. Will not harm soil. Economical total weed control. Kills weeds, roots, and all with systemic action. Apply to actively growing weeds. Do not cut weeds before applying. Weeds can be cut 3 to 5 days after applying.