Big D INDUSTRIAL DEODORANT is the classic wick-equipped bottle that has been keeping rooms odor-free for over 40 years. This oxidizing deodorant works wonders in public restrooms, sick rooms, smoking areas, and little-used or musty rooms. INDUSTRIAL DEODORANT eliminates any odor from the source through a catalytic reaction which oxidizes odors whenever they meet. 4 oz. wick bottles are made for use in large rooms and in big capacity heating/cooling systems. This size will last up to 90 days, depending on the ventilation conditions of the room. Where air movement is good, the bottle may be placed in a PASSIVE DISPENSER (sold separately). Where air movement is poor, it may be placed in a motorized dispenser such as the Big D LIGHT-ACTIVATED FAN DISPENSER (sold separately). The wick will remain wet as long as there is liquid in the bottle and wick is not extended beyond the recommended height.