Applications

HumiSeal® 2A64 – Two-Component Urethane Conformal Coating – Electronics Protection

-Item Name: HumiSeal® 2A64
-Manufacturer: HumiSeal
-Technologies: Two-component polyurethane conformal coating
-Color: Fluoresces under UV light
-Cure Type: 3 hours at 76°C
-Package Size: Contact Avantek for details.
-Shelf Life: 12 months

1. Product Overview

HumiSeal® 2A64 is a two-component polyurethane conformal coating designed for printed circuit board (PCB) protection. It has high solids, low viscosity for easy application, and fluoresces under UV light for inspection. The coating is MIL-I-46058C qualified, IPC-CC-830 compliant, and meets RoHS Directive 2011/65/EC.

2. Applications

  • Protection of PCBs in electronic assemblies
  • Ideal for applications requiring moisture, chemical, and dielectric resistance
  • Suitable for brushing, dipping, and spraying methods

3. Typical Properties

Property Value Standard
Density 1.07 ± 0.03 g/cm³ ASTM D1475
Solids Content 55 ± 5 % Fed-Std-141, Meth. 4044
Viscosity 130 ± 50 centipoise Fed-Std-141, Meth. 4287
VOC Content 501 g/L
Coating Thickness 25 – 75 microns
Drying Time to Handle 15 minutes Fed-Std-141, Meth. 4061
Curing Condition 3 hrs @ 76°C
Pot Life 8 hours
Shelf Life 12 months
Thermal Shock -65°C to 125°C MIL-I-46058C
CTE (Coefficient of Thermal Expansion) 82 ppm/°C (Below Tg) / 255 ppm/°C (Above Tg)
Glass Transition Temperature (Tg) 12°C DSC
Modulus 4101 MPa @ -40°C, 2777 MPa @ 25°C, 2 MPa @ 80°C DMA
Flammability Self-Extinguishing MIL-I-46058C
Dielectric Withstand Voltage >1500 volts MIL-I-46058C
Dielectric Breakdown Voltage 3500 volts ASTM D149
Dielectric Constant (1MHz, 25°C) 3.5 ASTM D150-98
Dissipation Factor (1MHz, 25°C) 0.024 ASTM D150-98
Insulation Resistance 4.5 × 10¹⁴ Ω MIL-I-46058C
Moisture Insulation Resistance 4.8 × 10¹⁰ Ω MIL-I-46058C
Fungus Resistance Passes ASTM G21

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