which wire to use for aluminum?

[poolemit]

Hi all, I have a Lincoln 3200HD which is MIG/flux-cored and have a quick q. I want to patch/fix a leaking car A/C which is made from aluminum. Which wire can I use for this job if I will not be using it in MIG mode (don't have gas).

thanks!

[76GMC1500]

I don't believe there is such a thing as a flux cored aluminum wire. Maybe, you should braze it using an aluminum brazing alloy and propane torch.

[DDA52]

You will have trouble with any alu under 1/8 with MIG. Under 1/8 is TIG territory usually. Alu for MIG is solid wire requiring straight Argon.

[smithboy]

I can't think of a single part on an car ac system that I would want to touch with a wire feeder of any type to repair a leak.

[76GMC1500]

Epoxy on a properly prepaired surface would certainly do the trick.

[poolemit]

thanks for the replies guys .. I'll probably try some sort of epoxy/sealant.

[mjedude]

Aluminum solder works great!

Messer MG Eutectic makes a good solder!