The Indium Solder FLUXWV-84603-1G is a no-rosin wave solder flux. It has no intentionally added halogens, no rosin, and exhibits exceptional hole fill as well as pin-testing performance that can only be achieved with a rosin-free material. In addition to exhibiting excellent soldering performance on a wide range of board finishes and board types, WF-9958 also passes the updated and more rigorous reliability requirements of the J-STD-004B Surface Insulation Resistance (SIR) and Electromigration (ECM) tests.