HumiSeal 1B31 PB 65 CPS Acrylic Conformal Coating
Harmonization Code : 3404.90.00.00 | Artificial waxes and prepared waxes : Other
Main features
- 65 +/- 5 cP Preblend
- Fast-Drying Moisture Protection
- Strong Cured Electrical Properties
Product Description
HumiSeal® 1B31 PB 65 CPS Acrylic Conformal Coating is a fast-drying, single-component acrylic conformal coating pre-blended to a viscosity suitable for immediate use. Designed for printed circuit assemblies, it provides moisture and environmental protection while maintaining excellent flexibility. The coating fluoresces under ultraviolet light for inspection, is easily repairable, and develops cured properties comparable to standard HumiSeal® 1B31.
Key features
- Ready-to-use viscosity: Supplied at 65 ± 5 cPs for immediate application without additional dilution.
- Moisture and environmental protection: Protects printed circuit assemblies from moisture and environmental exposure.
- Flexible and repairable: Produces a flexible coating that can be readily repaired when required.
- UV inspection: Fluoresces under ultraviolet light to assist coating coverage inspection.
Applications / Suitable for
- Conformal coating of printed circuit assemblies
- Applications requiring moisture and environmental protection
- Dip, spray, or brush coating processes using a compatible pre-blend viscosity
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Thermal Properties
Electrical Properties
Additional Information
As-supplied / before-processing properties
Typical liquid-coating and processing properties for HumiSeal® 1B31 PB 65 CPS. Values are not intended for use as specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Product form | Single-component acrylic conformal coating pre-blend | — | As supplied; specifically diluted for immediate use |
| Viscosity | 65 ± 5 | cPs | As supplied |
| Solids content | 24 ± 1 | % | As supplied |
| Density | 0.90 ± 0.02 | g/cm³ | As supplied |
| VOC | 685.8 | g/L | As supplied |
| Drying time to handle | 10 | minutes | Fed-Std-141, Method 4061 |
| Recommended curing conditions | 24 hours or 30 minutes | — | 24 hours at room temperature or 30 minutes at 76°C |
| Time to optimum properties | 7 | days | After application |
| Shelf life | 24 | months | From date of manufacture; store tightly closed at 0 to 35°C |
After-processing / final-state properties
Typical cured properties shared by HumiSeal® 1B31 and its pre-blends. Values are not intended for use as specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Recommended coating thickness | 25–75 | microns | Cured coating |
| Thermal shock | 50 cycles | — | MIL-I-46058C; −65°C to 125°C |
| Coefficient of thermal expansion, below Tg | 170 | ppm/°C | TMA |
| Coefficient of thermal expansion, above Tg | 340 | ppm/°C | TMA |
| Glass transition temperature | 14 | °C | DSC |
| Modulus at −40°C | 2000 | MPa | DMA |
| Modulus at 20°C | 1050 | MPa | DMA |
| Modulus at 60°C | 8.5 | MPa | DMA |
| Flammability | Self-extinguishing | — | MIL-I-46058C |
| Dielectric withstand voltage | >1500 | volts | MIL-I-46058C |
| Dielectric breakdown voltage | 7500 | volts | ASTM D149 |
| Dielectric constant | 2.5 | — | ASTM D150-98; 1 MHz and 25°C |
| Dissipation factor | 0.01 | — | ASTM D150-98; 1 MHz and 25°C |
| Insulation resistance | 8.0 × 1014 (800 TΩ) | ohms | MIL-I-46058C |
| Moisture insulation resistance | 6.0 × 1010 (60 GΩ) | ohms | MIL-I-46058C |
| Fungus resistance | Passes | — | ASTM G21 |
