Thompson"s WaterSeal wood brightener concentrate cleans all wood types, neutralizes wood after using other cleaners or strippers, and is specially formulated for redwood, cedar, and other highly resinous hardwoods. While many cleaners can darken these woods, Thompson"s WaterSeal wood brightener helps restore the wood"s natural color and beauty with concentrated cleaning power for decks, fences, siding, and other exterior wood surfaces. Removes dirt, mildew, algae, and fungus stains and maximizes the performance of waterproofers and stains. Coverage: 150 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. Gallon.