Applications

HumiSeal® 1B31/521 PB65 – Acrylic Conformal Coating – Automated Spray Application

-Item Name: HumiSeal® 1B31/521 PB65
-Manufacturer: HumiSeal
-Technologies: 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 month

1. Product Overview

HumiSeal® 1B31/521 PB65 is a fast-drying, single-component acrylic conformal coating designed for automated spray application without additional thinning. It offers excellent flexibility, UV fluorescence for inspection, and easy repairability. The coating is compliant with RoHS Directive 2002/95/EC.


2. Applications

  • Protection of electronic assemblies against environmental factors.
  • Used in automated spray equipment for efficient application.
  • Ideal for applications requiring fast drying and flexible coating.

3. Typical Properties

Property Value
Density 0.90 ± 0.02 g/cm³
Solids Content 25 ± 2 %
Viscosity 65 ± 5 centipoise
VOC 667 grams/liter
Drying Time (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
Glass Transition Temperature (Tg) 14°C
Thermal Shock -65°C to 125°C (50 cycles)
Coefficient of Thermal Expansion 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 >1500 volts
Dielectric Breakdown Voltage 7500 volts
Dielectric Constant (1MHz, 25°C) 2.5
Dissipation Factor (1MHz, 25°C) 0.01
Insulation Resistance 8.0 x 10¹⁴ ohms (800TΩ)
Moisture Insulation Resistance 6.0 x 10¹⁰ ohms (60GΩ)
Fungus Resistance Passes (ASTM G21)

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