My only experience is with the aluminum brazing rods. I would have tiny leaks and re-melting the repair might get rid of one only to create another. Searching, I found an “Aluminum Soldering Kit”. Ordered one to try. Be interested in your results. My thoughts would be that you would want to use the lowest temp possible as the aluminum expands so much, distorting the tank, assuming a torch is required. Tubs
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.