Applications

HumiSeal® 1B66 – Acrylic Conformal Coating – Electronics Protection

-Item Name: HumiSeal® 1B66
-Manufacturer: HumiSeal
-Technologies: Fast-drying, single-component acrylic conformal coating
-Color: Not specified
-Cure Type: 24 hrs at room temperature or 30 min at 76°C
-Package Size: Contact to Avantek for details.
-Shelf Life: 24 months

1. Product Overview

HumiSeal® 1B66 is a fast-drying, single-component acrylic conformal coating designed to protect printed circuit assemblies from moisture and environmental factors. It is flexible, easily repairable, and compliant with the RoHS Directive 2002/95/EC.

2. Applications

  • Provides moisture and environmental protection for PCBs
  • Suitable for dipping, spraying, and brushing application methods
  • Can be thinned using HumiSeal® Thinner 503 (dipping & brushing) or HumiSeal® Thinner 521 (spraying)
  • Can be removed using HumiSeal® Stripper 1080

3. Typical Properties

Property Value
Density (ASTM D1475) 0.91 ± 0.02 g/cm³
Solids Content (Fed-Std-141, Meth. 4044) 35 ± 3 %
Viscosity (Fed-Std-141, Meth. 4287) 200 ± 15 centipoise
VOC Content 592 g/L
Drying Time to Handle 10 minutes
Recommended Coating Thickness 25 – 75 microns
Curing Conditions 24 hrs @ RT or 30 min @ 76°C
Time to Reach Optimum Properties 7 days
Thermal Shock (MIL-I-46058C) -65°C to 125°C
Glass Transition Temperature (Tg – DSC) 14°C
Modulus (DMA @ 40°C) 850 MPa
Dielectric Withstand Voltage >1500 volts
Dielectric Breakdown Voltage (ASTM D149) 7500 volts
Dielectric Constant (ASTM D150-98, 1MHz, 25°C) 2.5
Dissipation Factor (ASTM D150-98, 1MHz, 25°C) 0.01
Insulation Resistance (MIL-I-46058C) 8.0 × 10¹⁴ ohms (800TΩ)
Moisture Insulation Resistance 6.0 × 10⁹ ohms (60GΩ)
Fungus Resistance (ASTM G21) Passes

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