Chemask WF solder masking agent is a high temperature temporary spot mask that protects component-free areas from molten solder during wave soldering. It is water soluble, designed to be removed with open and closed loop aqueous cleaning systems. - Chemask WF is low foaming and has no effect on deionized water (DI) system resin beds. This water soluble formulation is stable to rosin, organic and inorganic fluxes. Removed with inexpensive filters, increasing the life span of activated carbon/resin beds.