CHEMTRONICS Technical Data Sheet TDS # CWF8 Chemask WF Solder Masking Agent PRODUCT DESCRIPTION Chemask WF Solder Masking Agent is water soluble and designed to be removed with most aqueous cleaning systems. Chemask WF Solder Masking Agent contains high temperature compounds that protect component-free areas from solder during wave soldering. This water soluble formulation is stable to rosin, organic and inorganic fluxes. = Protects boards from molten solder to 515F (268C) Compatible with most flux types = Leaves no corrosive residue *" Non-contaminating = UV detectable TYPICAL APPLICATIONS During wave soldering, Chemask WF Solder Masking Agent protects: = Component Free Areas " Gold Connectors = Gold Fingers = Pin Connectors TYPICAL PRODUCT DATA AND PHYSICAL PROPERTIES Base Material Synthetic Resin Color Tan Solvent Stability Dissolves in water with or without detergent Flux Compatibility Aqueous Flux Temperature Stability 515F (268C) Tack-Free Drying Time 30 min. (10 mils @ 77F) Cure Time 1 hr. (10 mils @ 77F) Viscosity (@ 77F) 9,000 cps (+ 300 cps) Viscosity Adjusted With DI Water Contains UV Indicator Yes Solids Content ~ 40% Flash Point Nonflammable Weight/Gallon 8.8 lbs. COMPATIBILITY Chemask WF Solder Masking Agent is generally compatible with most materials used in printed circuit board fabrication. As with any solder masking agent, compatibility with substrate must be determined on a non-critical area prior to use.