BurnOut II Weed & Grass Killer, Concentrate, 16-oz.16 oz, concentrate burn out ii, kills weed, grasses, algae, & moss, kills within hours, for use on & around patios, walkways, driveways, flower beds, vegetable gardens, shrubs, trees, fences, etc, kills all types of grasses & weeds contains caprylac acid & capric acid, new epa registration, approved for organic gardening, 80% active ingredient.