UniweldP4KD9S Aluminum Soft Solder Kit with Metal Tip Flux Applicator

For aluminum battery tabs you’ll need a very hot iron, large tip helps keep heat stable for quick solder joints, the flux is the important ingredient it seems and you may be able to use the flux with your normal solder if the included solder isn’t too thick. Will mess up your tips and they’ll will need to be cleaned and re-tinned to get them back to normal but that’s just how this kind of flux is. You get a whole lot of flux and a large syringe for dispensing it. It’ll probably last me a lifetime for the small joints I’m using it for.

good product

A little tricky to use.. and it's expensive.. but it works

Excellent product. Works fantastic on aluminum-copper LiPo battery tabs. Where solder would not adhere using conventional solder paste, this product made solder cling to the tabs right away. Caution - it will ruin your soldering iron tip so use one that you can part with after soldering.

so whilst the kit didn't work for me, I am not sure I can fully blame the product. I was trying to fill a pinhole in my A/c condenser and just couldn't get it to seal. It would seemingly flow with the flux only to find that under pressure the 'freon' would leak (I could hear and feel it). I bought a butane torch with needle flame, that seemed to hot, added the soldering tip to the torch and that was about the right temp.Bottom line you HAVE to get the oil out of the condenser to properly fix it.Probably works great on a radiator.