Product Introduction
HumiSeal® 1A33 LTX is a high-performance, single-component polyurethane conformal coating for printed circuit boards (PCBs). This coating offers superior protection with reduced xylene and toluene concentrations, fully complying with VOC standards for electronic manufacturing in harsh environments.
HumiSeal® 1A33 LTX Features:
- Protection against moisture, salt, and corrosive environments.
- Fluoresces under UV light for easy inspection.
- MIL-I-46058C and IPC-CC-830 qualified.
- RoHS and UL recognized.
HumiSeal® 1A33 LTX Applications:
- PCB protection in challenging environments.
- Electronics manufacturing for high-quality components.
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.
Need help selecting the right product or solution?
| 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 |
