Re: Exothermic welder
HWS - I haven't used any of those oneshots yet. How much do they cost?
If they're not too expensive, then they're probably the way to go if you just need to make a weld or 2. But I'll bet if you have quite a few of the same type of welds to do, the molds are more cost effective?
I have a bunch of different molds that still work OK (if I use some Duxseal and maybe add a little extra shot powder to make up for wear). If you get them with wear plates and take care of them, the molds usually last well over 50 welds -- sometimes 100.
Of course, you can break a mold on the first weld, too.
GG -- why are you needing to make some exothermic welds? Is it a project requirement, or is it just something that you want to use because it's better?