Duckback 1 Gal Mason’s Select Concrete Cleaner 6500

Duckback Mason’s Select Concrete Cleaner is formulated to remove dirt, grime, oil, grease, mildew stains and algae stains from concrete and masonry surfaces. Concrete cleaner is a non-flammable, fast acting, easy-to-use concentrate that is 100% biodegradable and contains no phosphates. Neutralizes concrete and masonry surfaces after acid etching. One gallon yields up to 4 gallons of cleaning solution.