A device for applying a sealing compound into a closure cap for containers comprising: an outer stamp (18) and a concentric inner stamp (14), the stamps being movable with respect to each other, an annular gap (26) between the stamps (14, 18), 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 (14, 18), a feeding system for plasticized sealing compound within a stamp, which is connected to the annular gap (26), 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.