Product Introduction
HumiSeal® 1A33 LOF is a fast-curing, single-component polyurethane coating formulated for PCB protection. With a curing time of just 4 hours at 85°C, it offers excellent chemical resistance, physical hardness, and environmental protection, all while being safe and environmentally responsible.
HumiSeal® 1A33 LOF Features
- Fast curing with built-in accelerants
- High chemical resistance and physical hardness
- Low odor and low-toxicity solvents for a safer application
- Compliant with RoHS Directive 2015/683 and RoHS 2
HumiSeal® 1A33 LOF Applications
- Protects PCBs in high-reliability industries such as automotive and aerospace
- Ideal for environments requiring fast curing and robust performance
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?
| Property | Value |
|---|---|
| Density (per ASTM D1475, g/cm³) | 0.90 ± 0.04 |
| Solids Content (% by weight, per Fed-Std-141, Meth. 4044) | 44.5 ± 2.5% |
| Viscosity (CPS, per Fed-Std-141, Meth. 4287) | 295 ± 65 |
| VOC (grams/litre) | 488 |
| Recommended Coating Thickness (microns) | 25 - 75 |
| Drying Time to Handle (per Fed-Std-141, Meth. 4061) | 45 minutes @ 25°C |
| Recommended Thinner | Thinner 904, 600 |
| Recommended Stripper | HumiSeal® Stripper 1063 |
| Shelf Life at Room Temperature (DOM) | 12 months |
| Thermal Shock (50 cycles per MIL-I-46058C) | -65°C to 125°C |
| Coefficient of Thermal Expansion (TMA) | 193 ppm/°C |
| Glass Transition Temperature (Tg - DSC) | 26°C |
| Modulus (DMA) | 27.2 MPa |
| Flash Point | 22.5°C *estimated |
| Dielectric Withstand Voltage (per MIL-I-46058C) | >1500 volts |
| Dielectric Breakdown Voltage (per 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 (per MIL-I-46058C) | 2.0 × 10¹⁴ ohms (200TΩ) |
| Moisture Insulation Resistance (per MIL-I-46058C) | 1.6 × 10¹⁰ ohms (16GΩ) |
