Starbrite - Mildew Stain Blocker - 22 oz. - 86622 Nano-tech barrier prevents mold stains & mildew stains from forming. Features: Easy to use; just spray on area to be treated. Lasts up to 3 months (interior areas) Non-toxic formula; safe for use around people & pets. For use on fiberglass, vinyl, plastic, rubber, fabric and painted surfaces.