The COMET 500 hot-wedge welding machine from Leister offers practical convenience to reliably weld thick and thin geomembranes made of thermoplastics such as PE, HDPE and LDPE. It reaches speeds up to 8 m/min - without the need for a gearbox conversion. The required welding pressure can be set on the COMET 500 by means of a force module with an adjustment screw, depending on the application and/or material. The hot wedge is automatically positioned at the correct point in the overlap.