RE: Can I Braze Aluminum?
Aluminum brazing rod works very well. I have used this stuff many time to repair or create a muffler. It is available at the local hardware or welding store for about 7 bucks. No flux needed. The general comment is to use a stainless steel brush to clean the surfaces before brazing. I don’t worry about getting a perfect bead during application. If it isn’t pretty, I use a piece of cloths hanger wire as a paint brush to flow the material in and wipe it up the edge of the surface for a broader fillet. It really works great.
Multiflyer