Applications

HumiSeal® 1A20 – Urethane Conformal Coating – Electronics Protection

  • Item Name: HumiSeal® 1A20
  • Manufacturer: HumiSeal
  • Technology: Single-component, chemically resistant polyurethane conformal coating
  • Color: Fluoresces under UV light for inspection
  • Cure Type: Room temperature (24 hours) or accelerated (3 hours at 76°C)
  • Package Size: Contact Techniq VN for details
  • Shelf Life: 6 months

1. Product Overview

HumiSeal® 1A20 is a single-component, chemically resistant, fast-curing polyurethane conformal coating. It fluoresces under UV light for inspection and meets MIL-I-46058C, IPC-CC-830, and RoHS Directive 2002/95/EC standards. The product is UL-recognized under File Number E105698.


2. Applications

  • Protection of electronic assemblies and PCBs
  • Used in chemically harsh environments
  • Suitable for applications requiring fast curing and UV inspection

3. Typical Properties

Before Curing

Property Value
Density 1.02 ± 0.02 g/cm³
Solids Content 50 ± 3%
Viscosity 100 ± 30 cP
VOC 511 g/L
Recommended Coating Thickness 25 – 75 µm
Drying Time to Handle 60 minutes
Recommended Curing 24 hrs @ RT or 3 hrs @ 76°C
Time to Reach Optimum Properties 7 days
Shelf Life 6 months at RT

After Curing

Property Value
Thermal Shock Resistance -65°C to 125°C
Coefficient of Thermal Expansion 515 ppm/°C
Glass Transition Temperature (Tg) 71°C
Modulus (DMA) 89.6 MPa
Flammability (UL94) V-0
Dielectric Withstand Voltage >1500V
Dielectric Constant (1MHz, 25°C) 3.5
Dissipation Factor (1MHz, 25°C) 0.028
Insulation Resistance 3.0 x 10¹⁴ Ω
Moisture Insulation Resistance 4.8 x 10¹⁰ Ω
Fungus Resistance Passes
Chemical Resistance Excellent

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