MDG Fast Release Formula begins working immediately to eliminate mold, mildew and odors extremely quickly, treating areas up to 20???¬?? by 10???¬?? in size. It is the most effective solution for dealing with situations such as a leak during winter storage that results in foul odors when the boat is opened up. It is also ideal for removing foul smells or smoke odors from homes, RVs, apartments, garages, laundry rooms, cars or any other enclosed areas. This formula is not to be used while people or pets are present; after the area has been treated, use Slow Release Formula to keep it odor-free. NOT FOR SALE IN CALIFORNIA.