Applications

HumiSeal® UV40HV – Conformal Coating – Electronics Protection

  • Item Name: HumiSeal® UV40HV
  • Manufacturer: HumiSeal
  • Technologies: UV curable, acrylated polyurethane conformal coating
  • Color: Clear
  • Cure Type: UV cure with secondary moisture cure
  • Package Size: Contact to Avantek for details.
  • Shelf Life: 12 months

1. Product Overview

HumiSeal® UV40HV is a high-solids, single-component, UV-curable acrylated polyurethane conformal coating. It offers excellent chemical resistance, surface hardness, flexibility, and moisture resistance. The coating is tack-free after UV exposure and features a secondary moisture cure for unexposed areas. It fluoresces under UV light for inspection and complies with RoHS Directive 2011/65/EU.

2. Applications

  • Designed for dispensing and jetting applications
  • Compatible with substrates cleaned before coating or assembled with low-residue, “no clean” materials
  • Can be applied via selective coating equipment, hand spray, or brushing (for touch-up)
  • Suitable for use in electronic assemblies requiring high environmental and chemical resistance

3. Typical Properties

Property Value
Density 1.05 – 1.15 g/cm³
Minimum Solids Content 95%
Viscosity (Fed-Std-141, Method 4287) 3,700 ± 1,300 cP
Shelf Life (Room Temp.) 12 months
Recommended Stripper HumiSeal® Stripper 1100 (not available in EU)
Thermal Shock (50 cycles, -65°C to 125°C) Pass
Glass Transition Temperature (Tg) 45°C
Coefficient of Thermal Expansion (TMA) 85 ppm/°C (below Tg), 197 ppm/°C (above Tg)
Dielectric Withstand Voltage >1500V
Dielectric Constant (1MHz, 25°C, ASTM D150-98) 2.5
Dissipation Factor (1MHz, 25°C, ASTM D150-98) 0.01
Insulation Resistance 8.0 × 10¹⁴ Ω (800TΩ)
Moisture Insulation Resistance 4.7 × 10¹⁰ Ω (47GΩ)
Fungus Resistance (ASTM G21) Pass

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