Wet & Forget, 64 oz. Ready To Use, Outdoor Spray is perfect for small scale jobs. With a simple pull of the trigger, this spray goes to work cleaning porch steps, window ledges, boat seats, play equipment, or any outdoor surfaces plagued with moss, mold, mildew, and algae stains. No mixing is required, and it's bleach-free, so you can use it without worrying about damaging your surfaces. Just spray and leave it to do its work - no scrubbing or rinsing is necessary. This product covers 60-180 sq. ft. and is not intended for use on painted surfaces.