Sealing and guiding strip for a window with insert for corner of the window frame

A window sealing and guiding channel for a window frame carried by a vehicle door is arranged to match the sharp angle at the corner of the frame. A distal lip of the wall of the channel on the inside of the window is severed from the remainder of the channel side wall from a point on one side of the sharp corner, through the sharp corner to the end of the channel, and this lip is bent into a smooth curve to bridge across the sharp corner. The lip on the other channel side wall is also severed from the remainder of its side wall at the sharp corner. In addition, the lip of the other channel side wall is cut through to form a mitered joint matching the angle at the sharp corner. The remainder of the channel side walls is removed at the sharp corner and replaced by a previously molded insert having a channel-form at the sharp corner and an extended wall portion filling the gap where the lip of the inside channel wall bridges across the corner. A third wall of the channel has a lip which bridges the sharp corner in a smooth curve between the other lips and thereby hiding the molded insert from view.