A method for providing a molded body and for inserting said molded body into a hollow bar section with a cross-section of a predetermined width and height that remains constant over its length, from which a frame-type spacer for insulating glass panes is subsequently configured, the molded body bridging a gap in said spacer. According to said method, a strand-type semi-finished product with a cross-section that remains constant over its length is provided; the semi-finished product is positioned in relation to a separation tool in such a way that a predefined section of the semi-finished product lies on one side and the remaining section of the semi-finished product lies on the other side of a separation plane of the separation tool and the length of the predefined section that is measured in the longitudinal direction of the semi-finished product is adapted to the inner width of the hollow bar section.