Abstract: An apparatus and method for applying undiluted chemical dispersant to a waterborne oil spill using a gentle uniform rain producing nozzle consisting of a rotating element having teeth to break up the fluid stream in to gentle uniform rain-sized droplets having a minimum diameter for uniform dispersal over a wide area. The novelty of this invention is that it is the only neat spray dispersant apparatus and method specifying dispersal through a moving element configured nozzle having an adjustable flow rate. The apparatus is skid mounted and portable. It comprises a pump to suction dispersant from tanks or other receptacles where it is stored and pressurize the dispersant, a pressure manifold that allows the dispersant to pressurize and a monitor or hose attachment hydraulically connecting the pressure manifold to one or more configured nozzles that distribute the chemical dispersant upon the oil spill. The method comprises pressurizing dispersant and spraying it through a configured nozzle onto the oil spill.