Specially formulated to remove mildew stains, mold, algae, dirt, and other foreign matter from all painted, stained, unfinished, or weathered wood surfaces. Use for routine cleaning and properly preparing all surfaces prior to staining or painting. Ideal for exterior wood decks, siding, fences, railings, steps, and most exterior surfaces including aluminum, vinyl, plastic, and masonry. Rinse equipment and over spray areas thoroughly with water. Ready-To-Use Liquid. Covers approximately 200 Sq. Ft. per gallon (3.78 L).