Applications

HumiSeal® 1A67 – Polyester Urethane Conformal Coating for PCB Protection

Item Name: HumiSeal® 1A67
Manufacturer: HumiSeal
Technologies: Single-component polyester urethane conformal coating
Color: Not specified
Cure Type: 20 hours at 80°C, 7 days for optimum properties
Package Size: Contact to Techniq VN for details.
Shelf Life: 12 months

1. Product Overview

HumiSeal® 1A67 is a single-component polyester urethane conformal coating designed for the protection of printed circuit boards (PCBs). It is toluene-free, offers excellent flexibility, and provides long-term electrical insulation. The coating has low gas permeability and meets RoHS Directive 2002/95/EC compliance.

2. Applications

  • Protection of printed circuit assemblies (PCBs)
  • Suitable for spraying and brushing application methods
  • Compatible with no-clean flux (testing required for compatibility)

3. Typical Properties (Before Mixing)

Property Value
Density (ASTM D1475) 0.92 g/cm³
Solids Content (Fed-Std-141, Meth. 4044) 30%
Viscosity (Fed-Std-141, Meth. 4287) 750 ± 350 cP
VOC 644 g/L
Drying Time to Handle (Fed-Std-141, Meth. 4061) 25 minutes
Recommended Coating Thickness 25 – 75 microns
Curing Conditions 20 hrs @ 80°C
Time to Reach Optimum Properties 7 days
Glass Transition Temperature (Tg) – DSC 55°C
Dielectric Withstand Voltage (MIL-I-46058C) >1500V
Insulation Resistance (MIL-I-46058C) 6.93 x 10¹² Ω (6.93TΩ)
Moisture Insulation Resistance (MIL-I-46058C) 6.9 x 10¹⁰ Ω (69GΩ)

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