Deodorizer controls many organic odors such as smoke, mildew and pet odors by penetrating, dissolving and absorbing the odors. Deodorizer will work for 24 hrs at a time and may need to be re-applied depending on the severity of the odors. Deodorizer is designed for carpeting, but also works on walls, grout and air ducts. Recommended use in pump up sprayers after cleaning. Please see label for complete use and mixing instructions.