T-PUT Union Almg 3 description: Welding rods and bare wire electrodes for GTAW and GMAW of AlMg alloys containing up to 3 % Mg. Seawater resistant weld metal. For welding almost identically coloured joints on anodically oxidziable materials. Thorough cleaning of the workpiece bevels is necessary. Thicker plate materials require preheating to 150 C (302 F).