Prevents mildew stains up to 2 weeks. Removes tough mildew stains without scrubbing. It can be used on bathroom tiles, grout, fiberglass or vinyl showers, vinyl bathmats or shower curtains, vinyl awnings, vinyl boat tops, plastic garbage cans, diaper pails, and preparing surfaces for painting. Avoid contact with metal or old porcelain as X-14 can react with these materials and leave a rusty stain. Do not use X-14 on painted surfaces you do not intend to repaint. Do not use on natural marble. When using on vinyl, do not allow X-14 to contact cotton stitching or backing. Do not allow X-14 to come in contact with clothing, carpeting, or other fabrics which may become discolored or damaged. Avoid breathing vapors. Use only in well ventilated areas. Open windows and turn on fans before use. If vapors bother you leave the room immediately. Quart (32 fl. oz.). Trigger spray bottle.