Formulation: Potassium salts of fatty acids. 22.11% Controls: Moss, Liverwort, Mold, Mildew, Lichens and Algae. Use On: lawns, Roofs, Sidewalks, Buildings, Fences, Decks, Patio, Bark Mulch, Driveways, and Gravel Areas. Will NOT Stain Like Other Moss Control Products... Application: Ready-To-Spray - RTS Coverage: Quart RTS up to 500 sq. ft.