NosGuard SG Odor Boat Odor Eliminator - Fast-Release Vapor System The fastest, most effective way to eliminate foul odors from enclosed areas Eliminates odors extremely quickly from enclosed areas up to 20 by 10 in size Ideal for use in stored boats, RVs, vacation homes, garages and more Removes mold, mildew or associated odor, as well as musty smells, food and smoke odor Choline Dioxide CLO2 Formula begins working immediately