Messer supplies argon, methane, oxygen and acetylene to Master Solar in Šimanovci near Belgrade, Serbia. The company manufactures thermal solar energy equipment. Besides collectors, this also includes stratification cylinders for the water that is heated by the sun. The high-quality systems supplied by Master Solar have also proved themselves in extreme climatic conditions. The gases are used for different welding processes, including CMT (cold metal transfer) welding, which produces particularly high-quality welds with virtually no spatter. Other processes include robot welding of aluminium profiles as well as manual welding of copper components.