Applications

HumiSeal® 1B12 – Acrylic Conformal Coating – Electronics Protection

  • Item Name: HumiSeal® 1B12
  • Manufacturer: HumiSeal
  • Technology: Fast-drying, single-component acrylic conformal coating
  • Color: Not specified, easily soldered through and chemically removable
  • Cure Type: Room temperature (24 hours) or accelerated (30 minutes at 76°C)
  • Package Size: Contact Avantek for details
  • Shelf Life: 18 months

1. Product Overview

HumiSeal® 1B12 is a single-component, fast-drying, low-viscosity acrylic conformal coating designed for printed circuit assemblies. It is particularly suitable for impregnating coils, coating ferrite cores, and can be easily soldered through or chemically removed. The coating is RoHS Directive 2002/95/EC compliant.

2. Applications

  • Protection of PCBs and electronic components
  • Ideal for impregnating coils and ferrite cores
  • Compatible with dipping, spraying, and brushing application methods
  • Can be chemically removed or soldered through

3. Typical Properties

Before Mixing (Uncured Properties)

Property Value Test Method
Density 0.89 ± 0.02 g/cm³ ASTM D1475
Solids Content 21.5 ± 1.5% Fed-Std-141, Meth. 4044
Viscosity 30 ± 5 cP Fed-Std-141, Meth. 4287
VOC Content 714 g/L
Shelf Life 18 months

After Mixing (Cured Properties)

Property Value Test Method
Drying Time (Handle) 10 min Fed-Std-141, Meth. 4061
Recommended Coating Thickness 25 – 75 µm
Recommended Curing 24 hrs @ RT or 30 min @ 76°C
Time for Optimum Properties 7 days
Thermal Shock Resistance -65°C to 125°C (50 cycles) MIL-I-46058C
Glass Transition Temperature 32°C DSC
Coefficient of Thermal Expansion 56 ppm/°C TMA
Modulus 67.4 MPa DMA
Dielectric Breakdown Voltage >1500V MIL-I-46058C
Dielectric Constant (1MHz, 25°C) 2.8 ASTM D150-98
Dissipation Factor (1MHz, 25°C) 0.01 ASTM D150-98
Insulation Resistance 2.5 × 10¹⁴ Ω (250TΩ) MIL-I-46058C
Moisture Insulation Resistance 3.0 × 10¹⁰ Ω (30GΩ) MIL-I-46058C
Fungus Resistance Passes ASTM G21

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