Krud Kutter Deck & Fence Pressure Washer Concentrate Cleaner, 1 Gallon is a specially formulated cleaner designed to tackle tough stains on wood decks and fences. It contains Sporex, a unique additive that effectively removes mildew, mold, algae, fungus, and moss. This powerful formula restores the appearance of your outdoor wood surfaces by dissolving stubborn stains such as dirt, oil, grease, bird droppings, tree sap, and acid rain. It is also suitable for use on composite decks. The cleaner is earth-friendly, water-based, biodegradable, nonflammable, and nontoxic, making it safe for the environment and your family. One gallon of this concentrate makes 11 gallons of ready-to-use solution, covering an area of 1500 to 2000 square feet. It comes in a convenient 1-gallon pour bottle for easy application.