HumiSeal® 1A33 LTX is a high-performance, single-component polyurethane conformal coating, specially formulated for printed circuit board (PCB) applications. Designed with reduced xylene and toluene concentrations, it is fully compliant with the GB30981-2020 standard for VOCs and solvent usage. With its superior protection, ease of application, and environmental compliance, HumiSeal® 1A33 LTX is the ideal solution for ensuring the longevity and reliability of PCBs in challenging environments.
Product Features
- Polyurethane Chemistry: Provides robust and long-lasting protection.
- Single-Component Formulation: Simplifies the application process with no mixing required.
- Compliant with Industry Standards:
- MIL-I-46058C Qualified: Meets stringent military specifications.
- IPC-CC-830 Compliant: Adheres to PCB industry quality benchmarks.
- RoHS Directive 2011/65/EU Compliant: Ensures environmental responsibility.
- UL Recognition: Certified under UL File Number E105698.
- GB30981-2020 Compliant: Fully meets VOC and solvent usage limits.
- Pre-Blended Thinners Available: Offers a variety of viscosities tailored to different application methods.
- Fluorescence Under UV Light: Enables easy inspection and repair.
- Low Moisture Vapor Permeability: Enhances protection against environmental factors.
Key Advantages of HumiSeal® 1A33 LTX
- Superior Environmental Protection: Effectively shields PCBs from moisture, salt, corrosive environments, and dirt.
- Ease of Application: Compatible with automated systems for efficient coating processes.
- UV Fluorescence: Facilitates quick inspection and simplifies repair.
- Pre-Blended Options: Eliminates the need for additional dilution, saving time and ensuring consistency.
- Low VOC Content: Fully aligned with modern environmental standards for safety and sustainability.
Why Choose HumiSeal® 1A33 LTX?
HumiSeal® 1A33 LTX delivers exceptional protection for PCBs while prioritizing environmental compliance and ease of use. Its advanced formulation ensures reduced VOC content without compromising on performance, making it an excellent choice for modern electronics manufacturing.
Protect your PCBs with HumiSeal® 1A33 LTX—the industry’s trusted solution for durability, efficiency, and environmental responsibility.
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 (CPS) | Solids (%) | Density (g/cm³) | VOC (g/L) |
| 1A33 LTX | 180 ± 20 | 44 ± 2 | 0.95 ± 0.02 | 532 |
| 1A33 LTX/521 PB65 | 65 ± 5 | 40 ± 2 | 0.93 ± 0.02 | 559 |
| Property | Value |
| Recommended Coating Thickness | 25 – 75 microns |
| Drying Time to Handle (Fed-Std-141, Meth. 4061) | 15 minutes |
| Optional Curing Conditions to Reach Optimum Properties | 30 days @ RT, 30 hours @ 76°C, 20 hours @ 88°C |
| Recommended Stripper | HumiSeal® Stripper 1063 |
| Thermal Shock (50 cycles, MIL-I-46058C) | -65°C to 125°C |
| Coefficient of Thermal Expansion (TMA) | 193 ppm/°C |
| Glass Transition Temperature (DSC) | 26°C |
| Modulus (DMA) | 27.2 MPa |
| Dielectric Withstand Voltage (MIL-I-46058C) | >1500 volts |
| Dielectric Breakdown Voltage (ASTM D149) | 7500 volts |
| Dielectric Constant (1MHz, 25°C, ASTM D150-98) | 3.6 |
| Dissipation Factor (1MHz, 25°C, ASTM D150-98) | 0.03 |
| Insulation Resistance (MIL-I-46058C) | 2.0 × 10¹⁴ ohms (200TΩ) |
| Moisture Insulation Resistance (MIL-I-46058C) | 1.6 × 10¹⁰ ohms (16GΩ) |
| Fungus Resistance (ASTM G21) | Passes |
