The Art. MB butyl extruder ensures full compliance with the most stringent standards required for the primary seal. The Butyl rubber is dispensed by two extruder nozzles through two separate dispensers, which ensures an uniform distribution around the whole perimeter (a special feature unique to Forel). The touch screen unit manages at the same time the automatic opening of the nozzles (width adjustment) and the positioning of the pre-extrusion guides, according to the selected spacer width value. The injection capacity (grams of butyl rubber per linear metre) can be set directly. Art. MB is able to apply butyl rubber on shaped profiles or Georgian bar frames, with exceptional accuracy and simplicity of operation. Preproduction heating can be pre-set to automatically turn on.