HumiSeal® 1B31 LTX is a fast-drying, single-component acrylic conformal coating designed to protect electronics from moisture, corrosive environments, and dirt. Formulated with reduced xylene and toluene concentrations, HumiSeal® 1B31 LTX is fully compliant with GB30981-2020*, meeting strict VOC and solvent usage standards.
Key Benefits of HumiSeal® 1B31 LTX:
- Superior protection against moisture, salt, and corrosive environments.
- Easy application with automated systems.
- Fast curing and drying for efficient use.
- Low moisture vapor permeability for enhanced durability.
- Fluoresces under UV light for easy inspection and is simple to repair.
- Easy removal with HumiSeal® Strippers.
- Available in a range of pre-blends, ready for use without dilution.
Pre-blends Available:
- Pre-blend with Thinner 600: Ideal for enhanced spray applications.
- Pre-blend with Thinner 789: Perfect for film coater systems. Heated systems may be necessary for 120CPS pre-blends to improve coating coverage.
HumiSeal® 1B31 LTX delivers excellent performance in protecting electronics from harsh environments and dirt, ensuring longevity and reliability. Fully compliant with GB30981-2020*, it is the ideal solution for applications requiring reliable protection and ease of use.
For further information on how HumiSeal® 1B31 LTX can safeguard your electronics, contact Prostech today.
*Standard GB30981-2020 defines limits on VOCs and solvent usage for conformal coatings. Standard GB/T 23990-200 specifies the test method for solvent percentage analysis.
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.
| Product | Viscosity | Solids | Density | VOC** |
| (CPS) | (%) | (g/cm3) | (g/L) | |
| 1B31 LTX | 200 ± 15 | 35 ± 3 | 0.91 ± 0.02 | 592 |
| 1B31 LTX/600 PB120 | 120 ± 5 | 29.5 ± 1.5 | 0.92 ± 0.02 | 649 |
| 1B31 LTX/789 PB120 | 120 ± 5 | 31.5 ± 1.5 | 0.89 ± 0.02 | 610 |
| 1B31 LTX/600 PB65 | 65 ± 5 | 23.5 ± 1.5 | 0.90 ± 0.02 | 689 |
| 1B31 LTX/789 PB65 | 65 ± 5 | 26.5 ± 1.5 | 0.87 ± 0.02 | 639 |
| Product Specification | |
| Recommended Coating Thickness | 25 – 75 microns |
| Drying Time to Handle per Fed-Std-141, Meth. 4061 | 10 minutes |
| Recommended Curing Conditions | 24 hrs @ RT or 30 min @ 76°C |
| Time Required to Reach Optimum Properties | 7 days |
| Recommended Stripper | HumiSeal® Stripper 1080 |
| Thermal Shock, 50 cycles per MIL-I-46058C | -65°C to 125°C |
| Coefficient of Thermal Expansion – TMA | 170 ppm/°C below Tg |
| 340 ppm/°C above Tg | |
| Glass Transition Temperature – DSC | 14°C |
| Modulus – DMA | 2000 MPa @ -40°C 1050 MPa @ 20°C 8.5 MPa @ 60°C |
| 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 |
