Product Introduction
HumiSeal® 1B31LOC is a low VOC solvent-based conformal coating that complies with North American air quality regulations. It is a fast-drying, single-component acrylic coating that provides excellent moisture and environmental protection for printed circuit assemblies (PCAs). The coating offers superior flexibility, excellent electrical properties, and fluoresces under UV light, making inspection easy. Additionally, it is easily repaired, offering versatility in various applications.
HumiSeal® 1B31LOC Features
- Excellent moisture and environmental protection for printed circuit assemblies.
- Fluoresces under UV light for ease of inspection.
- Easy to repair.
- MIL-I-46058C qualified.
- Complies with IPC-CC-830 standards.
- Meets RoHS Directive 2015/863/EU.
HumiSeal® 1B31LOC Applications
- Ideal for use in printed circuit assemblies (PCAs).
- Ensures superior protection and reliability when applied to clean, dry, and contaminant-free substrates.
About Prostech
Prostech Philippines is a one-stop solution provider for specialty materials and equipment across electronics manufacturing, from PCBA to final assembly. Our core material and equipment solutions include:
- PCB Assembly Materials
- Cleaning & Degreaser
- Circuit Board Protection
- Thermal Management Solutions
- EMI Shielding
- General Assembly Adhesives
- Elastomeric Materials
- Process Equipment: Potting & Coating Systems, UV/ Heat Curing, Plasma Treatment, Tape placement automation, and cleaning machines
Technical Added Value to customer
Prostech offers customized material and process equipment solutions with engineering support throughout R&D, production process optimization, and performance validation. Our in-house lab located in Alabang, Muntinlupa is equipped to conduct electronics material testing, application simulation, and adhesive validation, helping customers reduce the need for onsite trials and accelerate implementation.
International Supply Chain Advantage
Regional warehouse hubs across Vietnam, Singapore, Malaysia, and the Philippines ensure cross-border reliable supply. In Philippines PEZA-bonded warehouse located at Lima Industrial Park, Batangas enables Prostech to provide responsive, demand-based delivery and significantly shortens standard lead time for Philippines customers.
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| Density, per ASTM D1475 | 1.20 ± 0.03 g/cm3 |
| Solids Content, % by weight per Fed-Std-141, Meth. 4044 | 25 ± 3 % |
| Viscosity, per Fed-Std-141, Meth. 4287 | 450 ± 25 centipoise |
| VOC | 91 grams/litre |
| Drying Time to Handle per Fed-Std-141, Meth. 4061 | 25 minutes |
| Recommend 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 | HumiSeal Thinner 701 |
| Recommended Stripper | HumiSeal 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°C |
| 8.5 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 | 7.0 x 1010 ohms (60GΩ) |
| Fungus Resistance, per ASTM G21 | Passes |
