A temporary, water soluble solder masking agent formulated with non-corrosive materials. Wondermask W is compatible with all organic and synthetic fluxes and is quickly removed in batch cleaning and in-line water systems. - This masking agent is available in three viscosities: Wondermask W (formulated for hand applications), Wondermask WA (for robotic and pneumatic dispensing equipment) and Wondermask WS (thicker formulation for silk screening and template screening operations).