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WSM-70
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Water Soluble Solder Mask
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8 oz. Bottle - 3730 Gallons - 3750
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WSM-70 is a blue water-soluble polymer that cures at room temperature. This material is formulated to resist the adhesion of solder to
specified areas of the circuit board during the soldering operation. After the solder operation, WSM-70 can be removed with hot water (140F, 60C) leaving no residue. WSM-70 is developed for use with
rosin fluxes and organic fluxes. This product is not to be used with inorganic acid fluxes.
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WSM-70 is applied using a plastic squeeze bottle or by brush.
Drying time varies according to mask thickness and relative humidity. Warm or cold dry air will quicken the drying time. Optimum coating thickness is 10 to 35 mils (.025 – 1 mm). For a thinner viscosity, water may be addes up to 2% by weight.
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WSM-70 is completely soluble in hot water, leaving no residue on the circuit board.
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WSM-70 can be stored up to one year from the date of manufacturing at room temperature (72, 22C).
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WSM-70 can be stored at room temperature in an unopened container.
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Please refer to Technical Data Bulletin #TD9000-The Complete Masking Selection Guide
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