Marine Seal Wood Dock Cleaner is an excellent wooden dock cleaner for wooden docks, marinas, piers, or any wood surface including decks, fences, docks or patio furniture. Marine Seal Wood Cleaner is a powdered concentrate that is mixed with water. One 2 lb. container makes 5 gallons of cleaner and will treat 500-1,000 sq. ft of surface area. Marine Seal Wood Dock Cleaner removes dirt, grime, and weathered graying from horizontal and vertical wood surfaces. This product is recommended for surface preparation prior to application or reapplication of clear finishes and wood stains (for best results use Marine Seal Wood Dock Stain). Apply cleaner in a test area to ensure proper results prior to proceeding on the entire project.