FLOOD Pro Series Wood Cleaner is a unique, premium quality product for restoring the clean, refreshed look to exterior wood and other surfaces. It cleans stains caused by mildew, dirt, algae, and mold without scrubbing. Unlike bleach alone, FLOOD Pro Series Wood Cleaner works on the surface to lift dirt that can then be rinsed away. This product contains no phosphates, acids, solvents, or petroleum distillates. Therefore, it will not harm most plants, pets, or fish when used as directed.