I've been through a pack of rods and a bag of brushes. It takes a LOT of practice to get it to take right but once you get the hang of it, it'll bond aluminum together as promised.
Mapp is about 800 degrees hotter than propane AND they usually have a rosebud tip instead of a pointed flame tip which helps spread the heat around to the aluminum instead of just focusing it in one place until the aluminum is too hot.
Mapp is about 800 degrees hotter than propane AND they usually have a rosebud tip instead of a pointed flame tip which helps spread the heat around to the aluminum instead of just focusing it in one place until the aluminum is too hot.