HumiSeal® 1B31S is a fast-drying, single-component acrylic conformal coating that provides enhanced adhesion and excellent protection against moisture and environmental factors for printed circuit assemblies. This coating offers outstanding flexibility, making it suitable for various applications. HumiSeal® 1B31S also fluoresces under UV light, simplifying inspection, and is easily repairable for long-term maintenance.
HumiSeal® 1B31S is MIL-I-46058C qualified and complies with IPC-CC-830 and RoHS Directive 2015/863/EU, ensuring high-quality standards and environmental responsibility.
Key Features of HumiSeal® 1B31S:
- Acrylic chemistry
- Fast drying
- Single component
- Excellent moisture and environmental protection
- Improved adhesion to difficult substrates
- UV light fluorescence for easy inspection
- Easy reworkability
- MIL-I-46058C qualification
- IPC-CC-830 compliance
- RoHS Directive 2015/863/EU compliant
Application of HumiSeal® 1B31S
For the best results, it’s essential that the substrate is clean before applying HumiSeal® 1B31S. The surface should be free from moisture, dirt, wax, grease, flux residues, and other contaminants. Any contamination can lead to potential issues and assembly failures.
Choose HumiSeal® 1B31S for reliable protection and superior performance for your printed circuit assemblies.
About Prostech
Prostech offers specialty materials (adhesives, tapes, thermal interface materials, insulating materials, sealants, PCB protection materials, …) along with manufacturing solutions. We proudly serve a wide range of industries and are an authorized distributor for leading global manufacturers of industrial materials and equipment. Our product range is designed to deliver customized solutions that address each customer’s unique needs.
With years of experience and a successful project history, we are confident in our ability to provide comprehensive material solutions. These solutions effectively tackle the challenges manufacturers face. To explore our full product catalog, simply click here. Our dedicated team is ready to assist with:
- Provide quotation, sample, TDS/MSDS, and technical consultation
- Testing sample quality and verifying product compatibility in our laboratory
- Customizing material formulas for special applications
- Adapting product sizes, quantities, and packaging to meet specific needs
- Offering expert advice on suitable equipment and automation processes
- Delivering technical training and on-site support for optimal product use
Moreover, Prostech ensures the safe and accurate global delivery of all materials, including “dangerous goods”, in compliance with legal regulations. For personalized technical support or to receive a quotation, please contact us today.
| 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 |
