Applications

HumiSeal® 1C49LV – Silicone Conformal Coating – Electronics Protection

  • Item Name: HumiSeal® 1C49LV
  • Manufacturer: HumiSeal
  • Technology: Moisture-curing, low-viscosity, VOC-free silicone conformal coating
  • Color: Not specified, fluoresces under UV light for inspection
  • Cure Type: Room temperature (24 hours) or accelerated (20 minutes at 76°C)
  • Package Size: Contact Avantek for details
  • Shelf Life: 12 months

1. Product Overview

HumiSeal® 1C49LV is a moisture-curing, low-viscosity, VOC-free silicone conformal coating that provides excellent protection for printed circuit assemblies against moisture and environmental factors. It is solvent-free, highly flexible, repairable, and fluoresces under UV light for inspection. The coating can be cured at room temperature or accelerated at elevated temperatures. It meets MIL-I-46058C, IPC-CC-830, and RoHS Directive 2011/65/EU compliance and is UL recognized under File Number E105698.

2. Applications

  • Moisture and environmental protection for PCBs
  • Conformal coating for electronics in harsh conditions
  • Suitable for brushing, dipping, and spraying application methods

3. Typical Properties

Property Value
Density (ASTM D1475) 0.97 ± 0.03 g/cm³
Solids Content (Fed-Std-141, Meth. 4044) 90% min.
Viscosity (Fed-Std-141, Meth. 4287) 550 ± 250 cP
VOC Content 0 g/L
Recommended Coating Thickness 50 – 200 microns
Drying Time to Handle (Fed-Std-141, Meth. 4061) 60 min
Recommended Curing Conditions 24 hrs @ RT or 20 min @ 76°C*
Time to Reach Optimum Properties 7 days
Recommended Stripper HumiSeal® Stripper 1091
Shelf Life at Room Temperature 12 months
Thermal Shock Resistance (MIL-I-46058C) -65°C to 200°C
Coefficient of Thermal Expansion (TMA) 323 ppm/°C above Tg
Glass Transition Temperature (DSC) < -65°C
Modulus (DMA) 9.0 MPa @ -40°C, 3.8 MPa @ 25°C, 3.2 MPa @ 80°C
Tensile Strength (ASTM D-412) 30-50 psi
Elongation (ASTM D-412) 80-120%
Flammability (UL94) V-0
Dielectric Withstand Voltage (MIL-I-46058C) >1500 volts
Dielectric Breakdown Voltage (ASTM D149) 7000 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) 5.0 x 10¹⁴ ohms (500TΩ)
Moisture Insulation Resistance (MIL-I-46058C) 1.0 x 10¹⁰ ohms (10GΩ)
Fungus Resistance (ASTM G21) Passes

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