A sealing tape, which has two base bodies made of soft foam that is capable of recovering after compression, which are arranged beside each other in a functional direction of the sealing tape, wherein the sealing tape has an upper side, an underside and a first and a second side flank, which connect the upper side and the underside, wherein the side flanks extend substantially perpendicularly to the functional direction of the sealing tape, wherein an adhesive layer for adhesion to a component, in particular a frame profile of a window or a door, is arranged in the region of the underside, wherein the upper side of the sealing tape has a profile with at least one depression in such a way that, in a completely expanded state, the sealing tape has a first height (h 1) in the region of the first side flank, a second height (h 2) in the region of the second side flank, and a third height (h 3), which is lower than the first height (h 1) and lower than the second height (h 2), in a region between the first and second side flank, wherein the region with the third height (h 3) is formed in a transition region between the two base bodies, wherein the sealing tape has a continuous barrier structure, which extends from the upper side to the underside and through the transition region, for reducing the water vapour diffusion permeability and/or air permeability in the functional direction, wherein the two base bodies are configured as originally separate units, which are connected to each other exclusively by means of the adhesive layer on the underside as well as, in the transition region, by means of the barrier structure, characterized in that at least one of the two base bodies has a covering, which surrounds the respective base body on the upper side, the underside and the side facing the other base body, wherein the covering forms at least a part of the barrier structure. wherein the sealing tape has an upper side, an underside and a first and a second side flank, which connect the upper side and the underside, wherein the side flanks extend substantially perpendicularly to the functional direction of the sealing tape, wherein an adhesive layer for adhesion to a component, in particular a frame profile of a window or a door, is arranged in the region of the underside, wherein the upper side of the sealing tape has a profile with at least one depression in such a way that, in a completely expanded state, the sealing tape has a first height (h 1) in the region of the first side flank, a second height (h 2) in the region of the second side flank, and a third height (h 3), which is lower than the first height (h 1) and lower than the second height (h 2), in a region between the first and second side flank, wherein the region with the third height (h 3) is formed in a transition region between the two base bodies, wherein the sealing tape has a continuous barrier structure, which extends from the upper side to the underside and through the transition region, for reducing the water vapour diffusion permeability and/or air permeability in the functional direction, wherein the two base bodies are configured as originally separate units, which are connected to each other exclusively by means of the adhesive layer on the underside as well as, in the transition region, by means of the barrier structure, characterized in that at least one of the two base bodies has a covering, which surrounds the respective base body on the upper side, the underside and the side facing the other base body, wherein the covering forms at least a part of the barrier structure.