WF-7742 is a VOC-free, no-clean fl ux specifi cally developed for Pb-free wave soldering of surface-mount, mixed-technology and through-hole electronics assemblies. WF-7742 is a water-based, nonfl ammable formulation dramatically reducing VOC emissions and eliminating special storage requirements. A wide process window provides excellent solderability on diffi cult to solder assemblies and reduces solder balling.