Originally Posted by bairdco
it's for aluminum only, and it works with mapp gas better than propane. i just use a regular yellow mapp bernzomatic torch.
i've been wanting to make an aluminum gas tank with it for awhile, but one of the problems is, after you weld up one side, the heat transfer will melt it when you try the other side. i'm sure there's a way to sheild it, but i haven't worked it out yet.
Try resting the tank on a wet towel. Or drape a wet towel over the areas that are already brazed. I have not tried that but it might work.