Chemask WF – Water Filterable Solder Mask

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.

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Features & Benefits

  • Easily removed in water cleaning cycles
  • Does not coat filtration equipment
  • Noncorrosive; safe for sensitive contacts
  • Removed with inexpensive filters, increasing the life span of activated carbon/resin beds
  • US Patent Number 6,207,265

Applications

  • Ideal for use with closed loop cleaning systems
  • Increases productivity by reducing cleaning system maintenance
  • Short-term high-temperature protection from molten solder to 515ºF/268ºC
Specifications MIL-STD-2000A, Para.5.3.18
Shelf Life 1 yr
Shipping Name Coating Compound Not Regulated
Harmonization Code 2508.4

FAQ's

How do I avoid peelable solder mask from breaking off and leaving residue behind?

The follow are factor to consider when trying to avoid breakage: 1) Curing – Partially cured mask will have more of a tendency to break or leave residue. 2) Temperature and duration in extreme heat – Mask is designed for wave soldering, which is about a second of exposure to molten solder temperatures (generally 550°-650°F). If the mask is sent through a reflow oven the duration is much longer, which can lead to more mask brittleness. If the mask is exposed to high-temperature solder (e.g. silver), it can also lead to more brittleness. 3) Application method – When hand applying, we recommend holding the bottle at about a 60° angle, rather than upright at 90°. That tends to apply the material as a thick blanket over the areas to be masked. When the bottle is held at 90°, the mask is generally applied thinner, and is forced through holes and around components. Those thin areas are more likely to become brittle and stay behind, and mask pushed into holes and around components is harder to remove, so more likely to break.

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Part # Size Units Per Case Price Per Case Add To Cart
CWF8

8 fl oz./ 236 ml L squeeze bottle

24 bottles $592.08
CWF1

1 gal / 3.7 liter container
Minimum order - 5 units

1 container $139.01
Order from an authorized distributor
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