INSTANT STAIN REMOVAL - Spray and watch as mold stains and mildew stains disappear without heavy scrubbing GENTLE YET POWERFUL - Buffered-bleach technology protects stitching and threads while delivering effective cleaning for marine and outdoor upholstery VERSATILE USE - Works on awnings, fiberglass, wood, concrete, drywall, siding, tile & grout, gutters, roofs, vinyl upholstery, and more PROFESSIONAL-STRENGTH - Concentrated formula for boats, homes, RVs, and commercial use EASY TO USE - Simply spray, wait until the stain disappears, then rinse. Stubborn stains may require a second application and light scrubbing SUPERIOR CLEANING POWER - More effective than unbuffered bleach-water based products or diluted supermarket brands IDEAL FOR FABRICS - Suited for outdoor acrylic fabrics including Sunbrella. Always test for colorfastness before use NOT JUST FOR BOATS - Perfect for use around the home or in RVs wherever mildew stains are a problem GREAT FOR LARGE AREAS - Available in a gallon size for use as a house wash/siding & roof cleaner with a pump sprayer