... need flux, which can be applied from a tube, with a brush, from the core of the ... for your application, but to be safe, always use a flux core so that you don’t forget. ... surface, good fluidness melt5) Good mechanical performance6) Good moisture, bright weld spot8) Forms: Bar, wireWe also produce ... assembly of sheet metal parts. Manual soldering uses a soldering iron or soldering gun. Alloys that melt ...