X-14 Instant Mildew Stain Remover eliminates mildew stains from tile, grout, fiberglass, shower doors, sinks, fixtures, counter tops, chrome, vinyl shower curtains, and many more surfaces, in seconds without scrubbing. It also works great removing mildew stains before painting as well as for eliminating mildew from vinyl awning and siding, boat tops, garbage cans, patio furniture, and boat covers.