This multipurpose cleaner is specially formulated to remove mold and mildew stains, algae, and dirt from all painted, stained, unfinished, or weathered wood surfaces. Unlike most wood cleaners, this easy-to-use concentrate does not require the addition of bleach. Ideal for wood decks, fences, and siding, it is also safe and effective on aluminum, vinyl, stucco, stone, composite decking, and cement. Dilution ratio: 4 parts water to 1 part cleaner. 1 Gal. cleaner/water solution will clean approximately 200 to 250 Sq. Ft. on smooth surface. Size: 1 Gal.