The magic is not in the flux….but it sure does help a lot, and we have many to help you on your forge welding tasks. Simple old standby’s coal/coke forging fluxes such as anhydrous borax and boric acid. Old formulations such as EZweld and Crescent Weld fluxes and onto the more modern chemical mixes such as Iron Mountain and Z-weld fluxes . Some have iron filings and some do not. Some are for forge welding in gas forges and some are for coal and coke forges. We have many options to stick it all together with.