Spacer for insulating glass units, comprising at least - a polymeric hollow profile, comprising - a first side wall (2.1) and a second side wall (2.2) arranged parallel thereto, a glazing interior wall, which connects the side walls (2.1, 2.2) to one another; - an outer wall, which is arranged substantially parallel to the glazing interior wall and connects the side walls (2.1, 2.2) to one another; - a cavity, which is surrounded by the side walls (2.1, 2.2), the glazing interior wall, and the outer wall, - a moisture barrier on the first side wall (2.1), the outer wall, and the second side wall (2.2) of the polymeric hollow body, wherein the moisture barrier comprises at least - a multi-layer system having a barrier function comprising at least one polymeric layer and an inorganic barrier layer, - a metallic or ceramic outer adhesive layer, wherein the adhesive layer has a thickness of less than 100 nm, - a binding layer arranged between the adhesive layer and the multi-layer system and containing a polymer selected from the group comprising oriented propylene, oriented polyethylene terephthalate, biaxially oriented propylene, and biaxially oriented polyethylene terephthalate, wherein the binding layer is directly adjacent the adhesive layer. - a polymeric hollow profile, comprising - a first side wall (2.1) and a second side wall (2.2) arranged parallel thereto, a glazing interior wall, which connects the side walls (2.1, 2.2) to one another; - an outer wall, which is arranged substantially parallel to the glazing interior wall and connects the side walls (2.1, 2.2) to one another; - a cavity, which is surrounded by the side walls (2.1, 2.2), the glazing interior wall, and the outer wall, - a moisture barrier on the first side wall (2.1), the outer wall, and the second side wall (2.2) of the polymeric hollow body, wherein the moisture barrier comprises at least - a multi-layer system having a barrier function comprising at least one polymeric layer and an inorganic barrier layer, - a metallic or ceramic outer adhesive layer, wherein the adhesive layer has a thickness of less than 100 nm, - a binding layer arranged between the adhesive layer and the multi-layer system and containing a polymer selected from the group comprising oriented propylene, oriented polyethylene terephthalate, biaxially oriented propylene, and biaxially oriented polyethylene terephthalate, wherein the binding layer is directly adjacent the adhesive layer. - a first side wall (2.1) and a second side wall (2.2) arranged parallel thereto, a glazing interior wall, which connects the side walls (2.1, 2.2) to one another; - an outer wall, which is arranged substantially parallel to the glazing interior wall and connects the side walls (2.1, 2.2) to one another; - a cavity, which is surrounded by the side walls (2.1, 2.2), the glazing interior wall, and the outer wall, - a moisture barrier on the first side wall (2.1), the outer wall, and the second side wall (2.2) of the polymeric hollow body, wherein the moisture barrier comprises at least - a multi-layer system having a barrier function comprising at least one polymeric layer and an inorganic barrier layer, - a metallic or ceramic outer adhesive layer, wherein the adhesive layer has a thickness of less than 100 nm, - a binding layer arranged between the adhesive layer and the multi-layer system and containing a polymer selected from the group comprising oriented propylene, oriented polyethylene terephthalate, biaxially oriented propylene, and biaxially oriented polyethylene terephthalate, wherein the binding layer is directly adjacent the adhesive layer. - a multi-layer system having a barrier function comprising at least one polymeric layer and an inorganic barrier layer, - a metallic or ceramic outer adhesive layer, wherein the adhesive layer has a thickness of less than 100 nm, - a binding layer arranged between the adhesive layer and the multi-layer system and containing a polymer selected from the group comprising oriented propylene, oriented polyethylene terephthalate, biaxially oriented propylene, and biaxially oriented polyethylene terephthalate, wherein the binding layer is directly adjacent the adhesive layer.