Alumaloy Alumaweld Alumarod Durafix
Here is where you buy the Rods: http://amzn.to/2eGdTlB
This is the torch I use: http://amzn.to/2fhNFEc
I'm using rod made by KT
The brazing rod is stronger than the parent material. Works on Aluminum, Pot Metal, other Zinc metals, etc.