Thompson"s WaterSeal wood cleaner concentrate is specially designed to remove weathered, clear, and tinted waterproofers and semi transparent stains with concentrated cleaning power for decks, fences, siding, and other exterior wood surfaces. It is pH neutral, which means you do not need to apply another solution before waterproofing or staining. Additionally, this cleaner maximizes the performance of waterproofers and stains. Removes dirt, mildew, algae, and fungus stains. Restores the wood"s natural beauty. Coverage: 100 to 250 sq. ft. per gallon depending on the condition and porosity of the wood. Drying: Wait 2 to 3 days, depending on weather conditions, for the wood to dry thoroughly before applying a Thompson"s WaterSeal waterproofer or stain. Clean up: Rinse equipment and brushes thoroughly with soap and water. Quart of concentrate makes 1 gallon of cleaner.