• Item Name: Chemtronics Chemask® (Product# CM8, CM1)
• Manufacturer: Chemtronics
• Technologies: Peelable solder masking agent, natural latex rubber
• Color: Pink
• Cure Type: Fast curing, ambient temperature (tack-free 15 min, full cure 30 min @ 25°C)
• Package Size: CM8: 8 fl. oz. / 236 mL liquid; CM1: 1 gal. / 3.7 L liquid
• Shelf Life: 2 years
Chemask® Solder Masking Agent is a fast-curing, peelable compound based on natural latex rubber. It provides temporary protection for printed circuit boards during wave soldering and conformal coating processes. With temperature stability up to 515°F (268°C), it cures quickly, is compatible with common fluxes and solvents, and leaves no residue after removal. The product is RoHS compliant, non-flammable, and environmentally safe with zero ODP (ozone depletion potential).
Protecting component-free areas during soldering
Shielding components, pin connectors, and sockets
Safeguarding temperature-sensitive components during wave soldering
Protecting board areas during conformal coating
| Property | Before Use / Unmixed | After Cure / Mixed (if applicable) |
|---|---|---|
| Base Material | Natural latex rubber | Peelable cured mask |
| Color | Pink | Pink (peelable) |
| Solvent Stability | Stable in hydrocarbons, HFCs, water, chlorinated solvents | Maintains integrity in solvents |
| Flux Compatibility | All types | Compatible with flux residues |
| Temperature Stability | — | Up to 515°F (268°C) |
| Drying Time (Tack-Free) | ~15 min @ 25°C (10 mils) | Fully cured in ~30 min @ 25°C |
| Viscosity (@ 25°C) | 20,000–28,000 cps (±500) | Solid peelable mask |
| Solids Content | ~60% | — |
| Flash Point | Nonflammable | Nonflammable |
| Weight/Gallon | ~7.2 lbs. | — |
| Shelf Life | 2 years | — |
| Removal | — | Peelable by hand/tweezers |
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