[crane]

I have a jar of aluminum brazing flux made by American Chemical and Flux Products. Says here it is for brazing and welding all aluminum alloys. You mix the powder flux with h2o to make a paste, apply to the weld joint . The liquid stage acts as a temperature indicator at which stage the brazing alloy should be added.

Does it work? well..... I've had limited succsess with smaller parts brazing together ok. Larger parts need alot of heat and that is out of my capabilities at home here. What is neat about the stuff is you can use it to solder Aluminum and copper together... its pretty neat watching a piece of AL tin up and solder just like copper.
I have more than I can ever use if you or anyone want a sample to play with.