HumiSeal® 1B31 conformal coating is an acrylic chemistry, fast drying and single component conformal coating. It has excellent moisture and environmental protection for printed circuit assemblies, excellent flexibility, fluorescence under UV light for ease of inspection and reworkability with ease. It has MIL-I-46058C qualification, IPC-CC-830 compliance and RoHS directive 2015/863/EU.
| Product Specification | |
| Density, per ASTM D1475 | 0.91 ± 0.02 g/cm3 |
| Solids Content, % by weight per Fed-Std-141, Meth. 4044 | 35 ± 3 % |
| Viscosity, per Fed-Std-141, Meth. 4287 | 200 ± 15 centipoise |
| VOC | 592 grams/liter |
| Drying Time to Handle per Fed-Std-141, Meth. 4061 | 10 minutes |
| Recommended Coating Thickness | 25 – 75 microns |
| Recommended Curing Conditions | 24 hrs @ RT or 30 min @ 76°C |
| Time Required to Reach Optimum Properties | 7 days |
| Recommended Thinner (dipping & brushing) | HumiSeal Thinner 503 |
| Recommended Thinner (spraying) | HumiSeal Thinner 521, 521EU |
| Recommended Stripper | Stripper 1080, 1080EU |
| Shelf Life at Room Temperature, DOM | 24 months |
| Thermal Shock, 50 cycles per MIL-I-46058C | -65°C to 125°C |
| Coefficient of Thermal Expansion – TMA | 170 ppm/°C below Tg340 ppm/°C above Tg |
| Glass Transition Temperature – DSC | 14°C |
| Modulus – DMA | 2000 MPa @ -40°C1050 MPa @ 20°C8.5 MPa @ 60°C |
| Flammability, per MIL-I-46058C | Self-Extinguishing |
| Dielectric Withstand Voltage, per MIL-I-46058C | >1500 volts |
| Dielectric Breakdown Voltage, per ASTM D149 | 7500 volts |
| Dielectric Constant, at 1MHz and 25°C per ASTM D150-98 | 2.5 |
| Dissipation Factor, at 1MHz and 25°C per ASTM D150-98 | 0.01 |
| Insulation Resistance, per MIL-I-46058C | 8.0 x 1014 ohms (800TΩ) |
| Moisture Insulation Resistance, per MIL-I-46058C | 6.0 x 1010 ohms (60GΩ) |
| Fungus Resistance, per ASTM G21 | Passes |
