Taking advantage of a permanent connection of compressed air, it delivers a soft and voluminous foam that lasts for a long time on the surfaces (flat or irregularly shaped), allowing a deep and prolonged action of the chemical agent used. The expanded product adheres more easily to the surfaces to be treated, also allowing a saving of chemical product. Foam with full lance, nozzle and flexible hose. Pressure indicator. Air load connection with integrated tap. Detergent level indicator. Seal cap.