Starbrite Mildew Stain Blocker Spray with Nano Tech Barrier - The Star Brite Mildew Stain Blocker Spray with Nano Tech Barrier prevents mold and 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 and pets For use on fiberglass, vinyl, plastic, rubber, fabric and painted surfaces