I believe that the inexpensive exothermic welds being discussed are the One-Shot by Erico or the Uni-Shots by Harger. I use these quite often, anytime I must connect to a ground rod outside. But if memory serves me correctly, both these inexpensive tipes are used for rod to conductor connections. I think that for conductor to conductor or other configurations, you must use the standard graphite mold and charge version. I couls be wrong, but that's all I could find.
