Silicone 1C49LV

HumiSeal® 1C49LV conformal coating is:

  • silicone based
  • fluoresces under UV light
  • room temperature, moisture cure
  • single component
  • high solids

HumiSeal 1C49LV conformal coating has:

  • No VOCs or solvent
  • excellent environmental resistance and moisture resistance
  • RoHS directive 2015/863/EU
  • recognized under UL file number E105698
  • MIL-I-46058C and IPC-CC-830 compliant

Application of 1C49LV Silicone Conformal Coating

Conformal coatings can be successfully applied to substrates that have been cleaned prior to coating and also to substrates assembled with low residue “no clean” materials. Users should perform adequate testing to confirm compatibility between the conformal coating and their particular assembly materials, process conditions and cleanliness level. Please contact a HumiSeal representative for additional information

1C49LV is designed for application without additional thinning. Solvents or other thinners should not be mixed with 1C49LV. 1C49LV may be applied by spray, brushing, flow coating or dipping. The time required to reach a tack-free state is dependent on ambient conditions such as temperature and relative humidity. The processing guidelines contained in this document were obtained with an ambient relative humidity of 50%.


HumiSeal® 1C49LV may be applied using conventional spraying equipment. Spraying should be done in an environment with adequate ventilation so that the vapor and mist are carried away from the operator. The use of thinner is not required or recommended for HumiSeal® 1C49LV.


Uniformity of the film depends on the component density and the operator’s technique.

Product Specification
Density, per ASTM D1475 0.97 ± 0.03 g/cm³
Min. Solids Content, % by weight per Fed-Std-141, Meth. 4044 90 %
Viscosity, per Fed-Std-141, Meth. 4287 550 ± 250 centipoise
VOC 0 grams/litre
Recommended Coating Thickness 50 – 200 microns
Drying Time to Handle per Fed-Std-141, Meth. 4061 60 min
Recommended Curing Conditions 24 hrs @ RT or 20 min @ 76°C*
Time required to Reach Optimum Properties 7 days
Recommended Stripper HumiSeal Stripper 1091
Shelf Life at Room Temperature, DOM 12 months
Thermal Shock, 50 cycles per MIL-I-46058C -65°C to 200°C
Coefficient of Thermal Expansion – TMA 323 ppm /ºC above Tg
Glass Transition Temperature – DSC < -65°C
Modulus – DMA 9.0 MPa @ -40ºC
3.8 MPa @ 25ºC
3.2 MPa @ 80ºC
Tensile, per ASTM D412 30-50 psi
Elongation, per ASTM D412 80-120 %
Flammability, per UL94 V-0
Dielectric Withstand Voltage, per MIL-I-46058C >1500 volts
Dielectric Breakdown Voltage, per ASTM D149 7000 volts
Dielectric Constant, at 1MHz and 25°C per ASTM D150-98 2.5
Dissipation Factor, at 1MHz and 25°C per ASTM D150-98 0.01
Insulation Resistance, per MIL-I-46058C 5.0 x 1014 ohms (500TΩ)
Moisture Insulation Resistance, per MIL-I-46058C 1.0 x 1010 ohms (10GΩ)
Fungus Resistance, per ASTM G21 Passes

* Place an open pan of water in the oven during curing

Other products in this chemistry include:

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