Applications

HumiSeal® 1A34 – Fast-Curing Urethane Conformal Coating

  • Item Name: HumiSeal® 1A34
  • Manufacturer: HumiSeal
  • Technology: Single-component, fast-curing polyurethane conformal coating
  • Color: Fluoresces under UV light for inspection
  • Cure Type:
    • 24 hours at room temperature
    • 4 hours at 76°C
    • Optimum properties reached in 7 days
  • Package Size: Contact Avantek for details
  • Shelf Life: 6 months

1. Product Overview

HumiSeal® 1A34 is a fast-curing, single-component polyurethane conformal coating. It is MIL-I-46058C qualified, IPC-CC-830 and RoHS compliant, offering easy application, UV fluorescence for inspection, and excellent environmental resistance.

2. Applications

  • Protective coating for electronic assemblies
  • Provides insulation and moisture resistance
  • Applied via dipping, spraying, or brushing

3. Typical Properties

Property Value
Density (ASTM D1475) 0.95 ± 0.02 g/cm³
Solids Content 39 ± 2 %
Viscosity 125 ± 75 centipoise
VOC 576 g/L
Coating Thickness 25 – 75 microns
Drying Time to Handle 120 ± 30 min
Curing Time 24 hrs @ RT or 4 hrs @ 76°C
Time for Optimum Properties 7 days
Thinner HumiSeal® Thinner 521, 521EU
Shelf Life 6 months
Thermal Shock -65°C to 125°C
Glass Transition Temperature 18°C
Modulus (DMA) 51.3 MPa
Flammability Self-extinguishing
Dielectric Strength >1500V
Dielectric Constant (1MHz, 25°C) 3.5
Dissipation Factor (1MHz, 25°C) 0.028
Insulation Resistance 1.7 × 10¹⁴ ohms (170TΩ)
Moisture Insulation Resistance 6.3 × 10¹⁰ ohms (63GΩ)
Fungus Resistance Passes ASTM G21

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