Abstract: A device (1), for sealing untight couplings and press connections consists of a pressing piece (2) which encompasses the periphery of the pipe, with which an additional seal (6) is pressed onto the intermediate space between the coupling (4) and the pipe (5), and of a counter-piece (3) which encompasses the coupling body and by way of which the pressing piece (2) is pulled in the direction of the coupling body and fixed with a form- and force-fit. The pressing piece (2) has essentially the shape of a hollow cylinder with an outer thread with an inner diameter which is equally large as the outer diameter of the pipe (5), and an outer diameter which is larger than the maximal diameter of the coupling (4). The counter-piece (3) likewise has essentially the shape of a hollow cylinder. The inner diameter over a part of the length of the counter-piece (3) corresponds to the diameter of a coupling (4) between the outer beads.