Review on 🔥 Bernzomatic AL3 Aluminum Brazing/Welding Rods - 12-Inch Rods, Working Temp 720-750°F, 2-Piece by James Ramirez

That's interesting. Not as elegant as soldering or soldering, and not exactly welding. Almost "hot melt" glue, but made of metal. As many have pointed out, use a full-size MAP-Pro or propane torch. Aluminum is an excellent heat sink, so it quickly dissipates incoming heat. There are some good instruction videos on the internet. Also, it doesn't flow like brazing or soldering, so prepare the area as you would weld. this. Chamfer or round the butt joint. Once the parts are heated to the right temperature, the stick will melt *on* the parts. With practice you can make some really good "beads" and it will be a pretty strong bond, but you won't melt the metal of the main parts. Practice first, the more the better. Don't be afraid to get warm. This takes some time, and the more detailed it takes, the longer it takes.