a device for applying a sealing compound into a closure cap for containers comprising : an outer stamp and a concentric inner stamp , the stamps being movable with respect to each other , an annular gap between the stamps , which is open towards the outside or the inside and of which at least one section is variable between an initial gap width and a gap width zero in the movement direction of the stamps in an axial relative movement of the stamps , a feeding system for plasticized sealing compound within a stamp , which is connected to the annular gap , a mechanism that prevent any reflux of the melt from the annular gap , and adjustment mechanism for at least one of the stamps for changing the gap width of the annular gap .