The Star brite 85600 is a 1-gallon mildew stain remover designed for fiberglass, vinyl, plastic, and painted surfaces. Its triple-action formula, featuring buffered-bleach technology, chelating agents, and surfactants, eliminates mold and mildew stains on contact without heavy scrubbing. This product is intended for use on boats, homes, and RVs and is marine tested to be gentle on upholstery and stitching.