I hope you gentlemen can help me. I am in the process of trying to tin/silver solder a copper cylinder to an aluminium alloy head. I am using Bakers fluid on the cylinder, tin/silver solder to BS EN 29453 and my tech data states to use ARAX liquid flux on the alloy side. I understand that ARAX liquid flux might now be out of circulation, what is a valid alternative? I simply don't have the knowledge to make a sound decision myself.
