Profile made of at least an elastomer or a plastomer, particulary designed for the equipment of an opening or framing an opening, and process for its manufacture

The extrusion (1) of an elastomer or plastomer material without reinforcement is made with additional coextruded elastomer or plastomer beads (6) that are cooled after extrusion or after a subsequent heating stage such as vulcanisation. The beads are located on the outer surface of the main extrusion and they are made of a material that shrinks on cooling to produce a required shape, e.g. to give localised variations in thickness or surface protuberances. The main extrusion can have a U-shaped or omega cross-section, with the additional beads applied to at least part of its two branches, or along lines connecting it to a second, tubular extrusion (3).