Applications

HumiSeal® 2A53 – Epoxy Conformal Coating – Electronics Protection

  • Item Name: HumiSeal® 2A53
  • Manufacturer: HumiSeal
  • Technologies: Two-component epoxy conformal coating
  • Color: Not specified
  • Cure Type: Room temperature (7 days) or elevated temperature (2 hours at 93°C)
  • Package Size: Contact to Avantek for details.
  • Shelf Life: 12 months

1. Product Overview

HumiSeal® 2A53 is a two-component epoxy conformal coating designed for protecting printed circuit boards (PCBs) in environments requiring exceptional resistance to solvents and chemicals. It meets MIL-I-46058C and IPC-CC-830 standards and is RoHS compliant. The coating fluoresces under UV light for inspection and offers self-extinguishing flammability properties.

2. Applications

  • Protective coating for PCBs in harsh chemical environments
  • Conformal coating for electronics requiring MIL-I-46058C compliance
  • Suitable for brushing, dipping, and spraying application methods

3. Typical Properties

Property Part A Part B Mixed
Density (ASTM D1475) – – 0.93 ± 0.03 g/cm³
Solids Content (Fed-Std-141, Meth. 4044) – – 54 ± 5 %
Viscosity (Fed-Std-141, Meth. 4287) – – 350 ± 150 cP
VOC – – 455 g/L
Recommended Coating Thickness – – 25 – 75 microns
Drying Time to Handle (Fed-Std-141, Meth. 4061) – – 5 hours
Time to Reach Optimum Properties – – 7 days (or 2 hours at 93°C)
Pot Life at Room Temperature – – 24 hours
Shelf Life at Room Temperature – – 12 months
Thermal Shock Resistance (MIL-I-46058C) – – -65°C to 125°C
Coefficient of Thermal Expansion (TMA) – – 56 ppm/°C
Glass Transition Temperature (DSC) – – 19°C
Modulus (DMA) – – 32.2 MPa
Flammability (MIL-I-46058C) – – Self-Extinguishing
Dielectric Withstand Voltage (MIL-I-46058C) – – >1500 volts
Dielectric Breakdown Voltage (ASTM D149) – – 8000 volts
Dielectric Constant (ASTM D150-98, 1MHz, 25°C) – – 3.0
Dissipation Factor (ASTM D150-98, 1MHz, 25°C) – – 0.03
Insulation Resistance (MIL-I-46058C) – – 2.0 x 10¹⁴ ohms (200TΩ)
Moisture Insulation Resistance (MIL-I-46058C) – – 2.8 x 10¹⁰ ohms (28GΩ)
Fungus Resistance (ASTM G21) – – Passes
Resistance to Chemicals – – Excellent

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