Abstract: A method is disclosed of adapting a length of sealing strip to suit an acute-angled corner in the frame of a door opening or the like. The sealing strip comprises a longitudinal channel-shaped metal-reinforced gripping portion having a longitudinal soft sealing portion attached along one of its outside walls. The sealing strip is bent to form two lengths which are respectively aligned with the runs of the door frame leading to the acute-angled corner, but with the sealing strip smoothly curved between these two runs so as to part from the door frame at the actual corner. A part of the sealing portion is cut out at the actual corner and replaced with a corner section which is shaped to match the acute angle at the corner and to cover the gap between the sealing strip proper and the corner of the door frame.