We weld aluminum 5 days a week at our business. We have 3 High frequency MIG machines that are set up specifically for Aluminum. I deal with it every week day.....
I just read the sales pitch and I'd have to see it to believe it. I've never seen any application where aluminum doesn't have to be cleaned, beyond clean to make a repair. "They" claim that their product penetrates the oxidation on aluminum and that oxidation makes a stronger repair. It sounds like snake oil to me.
Having said that, I will attempt to find some of those rods and I will try them on something. IF they do work as advertised, then it would be a great solution for an "on the fly" fix. I am highly skeptical though.
I do not think you'll melt a hole in the aluminum with a propane torch if you're careful. If you get close to thin aluminum with an oxy/acetylene torch, it's going to have a hole in it.