Sunnyside Deck Wash, Gallon is a ready-to-use solution designed to clean and remove dirt, mildew, algae, and fungus stains from unpainted exterior wooden surfaces. This effective deck and fence wash restores the natural appearance of weathered wood and works well on composite decks too. Formulated to be completely biodegradable, it contains no petroleum distillates, acids, or phosphates, making it an environmentally friendly choice for maintaining your outdoor spaces. Each gallon covers between 150 to 250 square feet, providing thorough cleaning with ease. Model Number: 727G1