Apparatus for extruding a profile on a glazing comprises drive means on which is mounted an extrusion head with an extrusion nozzle, and means for rotating the nozzle relative to the drive means. The apparatus may be used in a process which comprises extruding the profile through the nozzle while it is being moved by the drive means along a first edge of a glazing, around a corner of the glazing and along a second edge of the glazing, the nozzle being rotated relative to the drive means as it moves around the corner. The extruded profile comprises a first edge portion extending along a first edge of the glazing, a sharp corner portion extending around a sharp corner of the glazing and a second edge portion extending along a second edge region of the glazing, the portions of the profile being continuous.