A cylinder-piston unit, with at least one cylinder accommodating an injection solution, at least one piston, and an adhesive coating arranged in the area of the free end face of the cylinder. The cylinder has a bottom portion, on which a discharge tube is arranged. An adhesive disc, which is displaceable in the direction of the center line of the cylinder-piston unit between an installation position and an application position, is arranged on the discharge tube and/or on the bottom portion. On its end face directed away from the bottom portion, the adhesive disc has an adhesive coating. In the storage position, the adhesive disc has at least one sealing element or a sealing area for closing the discharge tube, the effect of which sealing element or sealing area is no longer present in the application position.
