OLYMPIC Multi-Surface Cleaner, with its S-74 deep cleaning formula, is a unique, premium quality product for restoring the clean, natural look to exterior wood and other surfaces. It cleans stains caused by mildew dirt, algae and mold without scrubbing. Unlike bleach alone, OLYMPIC Multi-Surface Cleaner penetrates deep into the wood and lifts dirt to the surface to be rinsed away. This product contains no phosphates, acids, solvents or petroleum distillates. When used as directed, it will not harm most plants, pets or fish. 3.78 L.