• Item Name: Chemtronics Chemask® LF (Product# CLF8)
• Manufacturer: Chemtronics
• Technologies: Peelable solder masking agent, natural latex rubber, lead-free formulation
• Color: Pink
• Cure Type: Fast curing, ambient temperature (tack-free 15 min, full cure 30 min @ 25°C)
• Package Size: 8 fl. oz. / 236 mL liquid
• Shelf Life: 2 years
Chemask® LF Lead-Free Solder Masking Agent is a temporary, peelable, high-viscosity compound designed specifically for high-temperature lead-free soldering applications. It withstands up to 550°F (288°C), cures quickly, and leaves no residue after removal. The product is compatible with all flux types and cleaning solvents, making it ideal for protecting sensitive PCB areas during wave soldering and conformal coating. It is RoHS compliant, non-flammable, and engineered for industrial electronic manufacturing environments.
Protecting component-free areas during soldering
Shielding components and sockets
Covering pin connectors during wave soldering
Safeguarding temperature-sensitive components
Suitable for both lead-free and Tin/Lead soldering processes
| 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 hydrocarbon, HFC, chlorinated, halogenated solvents | Maintains stability in solvents |
| Flux Compatibility | All types | Compatible with flux residues |
| Temperature Stability | — | Up to 550°F (288°C) |
| Drying Time (Tack-Free) | ~15 min @ 25°C (10 mils) | Fully cured in ~30 min @ 25°C |
| Viscosity (@ 25°C) | ~190,000 cps (±500) | Solid peelable mask |
| Solids Content | ~80% | — |
| Flash Point | Nonflammable | Nonflammable |
| Weight/Gallon | ~7.2 lbs. | — |
| Shelf Life | 2 years | — |
| Removal | — | Peelable by hand/tweezers |
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