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Thermal Management

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 Techniq VN 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

BERGQUIST microTIM mTIM 1028 Thermal Interface Coating High performance thermal management solution for nickel finished heat sinks, optical transceivers, and data center liquid cooling systems

BERGQUIST microTIM mTIM 1028 is purpose built for riding cage assemblies in servers, switches, and routers, interfacing with electroless nickel plated copper or aluminum heat sinks. It ensures stable operation in high power transceiver modules while also extending applicability to liquid cooling components, heat pipes, and fin based dissipative structures.

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