Soldering Flux-103. It is a water soluble organic activated flux. It is used where inorganic fluxes are too corrosive to use and rosin fluxes are too inactive for the application. It is essential that the flux residues be completely and adequately removed. Normally DI water is used for such cleaning. The flux is also designed for roll tinning of PC Boards. ICM roll tinning salt (item code: 861) is used along with it. The flux can be applied by foaming, spraying, dipping or brushing.