WD-40 Presta 260240 X-14 Mildew Professional Stain Remover, 1 Gallon (3 Pack)Not only does X 14 Mildew Stain Remover work without scrubbing. It's been proven to remove mildew stains faster. X 14 is also great for use on hard surfaces where mildew stains might form. Use it on sealed grout, tile, vinyl and plastic surfaces. X 14 is also great for use on any hard surface where mildew stains might form: in the bathroom, kitchen, on campers, boats and more. Powerful mildew remover which contains more sodium hypochlorite than the