Applications

HumiSeal® 1B31 LTX – Acrylic Conformal Coating – Moisture & Corrosion Protection

-Item Name: HumiSeal® 1B31
-Manufacturer: HumiSeal
-Technologies: Acrylic Conformal Coating
-Color: Not specified
-Cure Type: 24 hrs @ RT or 30 min @ 76°C
-Package Size: Contact to Avantek for details.
-Shelf Life: 24 months

1. Product Overview

HumiSeal® 1B31 is a fast-drying, single-component acrylic conformal coating designed to protect printed circuit assemblies from moisture and environmental conditions. It offers excellent flexibility, easy repairability, and UV fluorescence for inspection. The product complies with MIL-I-46058C, IPC-CC-830, and RoHS 2002/95/EC standards.

2. Applications

  • Protection of printed circuit boards (PCBs) from moisture and contaminants.
  • Suitable for use in electronics, automotive, and aerospace applications.
  • Can be applied via dipping, spraying, or brushing.

3. Typical Properties

Property Value
Density (ASTM D1475) 0.91 ± 0.02 g/cm³
Solids Content 35 ± 3%
Viscosity 200 ± 15 cP
VOC Content 592 g/L
Drying Time to Handle 10 minutes
Recommended Coating Thickness 25 – 75 µm
Curing Conditions 24 hrs @ RT or 30 min @ 76°C
Time for Optimum Properties 7 days
Shelf Life 24 months
Thermal Shock Resistance -65°C to 125°C (50 cycles)
Glass Transition Temperature (Tg) 14°C
Coefficient of Thermal Expansion (CTE) 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
Flammability Self-extinguishing
Dielectric Withstand Voltage >1500 V
Dielectric Breakdown Voltage 7500 V
Dielectric Constant (1MHz, 25°C) 2.5
Dissipation Factor (1MHz, 25°C) 0.01
Insulation Resistance 8.0 × 10¹⁴ Ω
Moisture Insulation Resistance 6.0 × 10¹⁰ Ω
Fungus Resistance Passes ASTM G21

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