Applications

HumiSeal® 1R32 – Fast-Drying Acrylic Conformal Coating for Electronics Protection

-Item Name: HumiSeal® 1R32
-Manufacturer: HumiSeal
-Technologies: Single-component acrylic conformal coating
-Color: Fluoresces under UV light
-Cure Type: 24 hrs at room temperature or 30 min at 76°C
-Package Size: Contact Techniq VN for details.
-Shelf Life: 24 months

1. Product Overview

HumiSeal® 1R32 is a fast-drying, single-component acrylic conformal coating designed to provide excellent moisture and environmental protection for printed circuit assemblies. It fluoresces under UV light for easy inspection and is RoHS-compliant.


2. Applications

  • Protection of printed circuit assemblies.
  • Used in electronics to prevent moisture damage and corrosion.
  • Suitable for dipping, spraying, and brushing application methods.

3. Typical Properties

Unmixed Properties

Property Value
Density (ASTM D1475) 0.91 ± 0.02 g/cm³
Solids Content (Fed-Std-141, 4044) 35 ± 2 %
Viscosity (Fed-Std-141, 4287) 220 ± 30 cP
VOC Content 600 g/L
Drying Time to Handle (4061) 10 minutes
Recommended Coating Thickness 25 – 75 µm
Recommended Curing 24 hrs @ RT or 30 min @ 76°C
Time for Optimum Properties 7 days
Thermal Shock (MIL-I-46058C) -65°C to 125°C
Glass Transition Temperature (DSC) 14°C

Electrical & Mechanical Properties

Property Value
Coefficient of Thermal Expansion (TMA) 170 ppm/°C (below Tg), 340 ppm/°C (above Tg)
Modulus (DMA) 2000 MPa @ -40°C, 1050 MPa @ 20°C, 8.5 MPa @ 60°C
Dielectric Withstand Voltage (MIL-I-46058C) >1500 V
Dielectric Breakdown Voltage (ASTM D149) 7500 V
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 Ω (800 TΩ)
Moisture Insulation Resistance (MIL-I-46058C) 6.0 × 10¹⁰ Ω (60 GΩ)
Fungus Resistance (ASTM G21) Passes

Recommended Thinners & Strippers

Application Recommended Thinner
Dipping & Brushing HumiSeal® Thinner 505
Spraying HumiSeal® Thinner 521
Stripping HumiSeal® Stripper 1080

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