... copper clad ground rod, exothermic welding mould, exothermic welding powder, grounding electrode, GEM and so on. LEDWELD exothermic welding ... are packed in boxes of 40 or 50, depending on their size. Different joints require different powder sizes, and the ... which has strong resistance of corrosion.The standard welding powder for grounding system TYPENO. OF USES/BAGTYPENO. OF USES/BAG#3220 #11510 ...