DEFY Exterior Wood Stain Stripper is a biodegradable, easy-to-use deck stain remover that will remove weathered, clear, and semi-transparent wood stains and restore the natural beauty of wood surfaces. Stains and varnishes are removed with the collected dirt, mold, mildew and mill glaze.If you are unsure whether the wood needs to be stripped or just cleaned, test a small, inconspicuous area to determine which method will provide the best results before proceeding. DEFY Exterior Wood Stain Stripper will cover 100-150 sq. ft. per gallon.Apply a generous amount of the product with a polyester brush, roller, or pump-up sprayer. Then allow it to set for 15 minutes. Once the finish begins to lift, scrub with a stiff bristle brush in the direction of the wood grain. After scrubbing, rinse with large amounts of water in the direction of the wood grain.Using a pressure washer, though not mandatory, will eliminate the need for scrubbing. However, particular care should be taken with a power washer to avoid damaging the wood. After rinsing, you must neutralize and brighten the wood with DEFY Wood Brightener immediately. If stubborn areas remain, repeat the application in those areas. QUICK FACTS Coverage Rate: Approx. 100-150 sq. ft. per gallon Available Sizes: 1 gal containers Application Temperatures: Minimum 45° F Application Method: Pump Sprayer Rinsing Method: Garden Hose or Power Washer Cleanup: Soap & Water Click here for Product Data & Safety Sheets.  Warning: This product can expose you to 1,4-dioxane, which is known to the State of California to cause cancer and Chloromethane, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov