Remove the unsightly discoloration caused by tannin bleed in extractive prone wood species, such as redwood or red cedar. This concentrate is also excellent for the removal of nailhead rust stains. After using, the color of the wood is restored to a rich new wood look. Can be applied to new or previously stained or painted wood surfaces including siding, shingles, decks, fences, railings, and steps. Wood brightener is a necessary neutralizer for Problem Solver wood striper. Dilution ratio: 4 parts water to 1 part brightener. Approximate coverage of gallon/water solution is 200 to 250 sq. ft. Gallon size.