UV curable UV 40 Solar
Model No: UV-40

HumiSeal® UV40-SOLAR is a single component, low viscosity, high solids conformal coating material that has been formulated for use under prolonged exposure to sunlight, without discoloration or degradation. It meets the requirements of SAE-J-1960 standard (QUV accelerated age testing). In addition, the coating possesses excellent chemical resistance, surface hardness, flexibility, moisture resistance and is tack-free after exposure to UV light. A secondary moisture cure mechanism will cure unexposed areas within 2-3 days at ambient conditions.

 Product Enquiry

HumiSeal® UV40 SOLAR conformal coating is:

  • single component
  • high solids
  • UV curable
  • acrylated polyurethane
  • no-yellowing with exposure to UV
  • meets requirements of SAA-J1960


HumiSeal® UV40 SOLAR conformal coating has:

  • excellent chemical resistance, surface hardness, flexibility and moisture resistance.
  • secondary moisture cure mechanism for curing in the non-UV exposed shadowed areas
  • fluoresces under UV light to allow for coating inspection
  • can be applied by selective coating equipment.
  • recognized under UL File Number E105698
  • MIL-I-46058C qualified
  • IPC-CC-830 and RoHS Directive 2015/65/EU compliant


Application of HumiSeal® UV40 SOLAR 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” assembly materials. Users should perform adequate testing to confirm compatibility between the conformal coating and their particular assembly materials, process conditions and cleanliness level. 


Product Specification


1.06 g/cm3

Minimum Solids Content

95 %

Viscosity, per Fed-Std-141, Meth. 4287

650 ± 150 centipoise

Recommended Coating Thickness

25-125 microns

Recommended UV Cure*

See TDS for Details

Shelf Life at Room Temperature, DOM

12 months

Thermal Shock, 50 cycles per MIL-I-46058C

-65ºC to 125ºC

Glass Transition Temperature – DSC


Coefficient of Thermal Expansion – TMA

85 ppm/ºC Below Tg
197 ppm/ºC Above Tg

Modulus – DMA

10364 MPa @ -40°C
4283 MPa @ 25°C
66 MPa @ 80°C

Dielectric Withstand Voltage, per MIL-I-46058C

>1500 votls

Dielectric Constant, at 1MHz and 25°C per ASTM D150-98


Dissipation Factor, at 1MHz and 25°C per ASTM D150-98


Insulation Resistance, per MIL-I-46058C

8.0 x 1014 ohms (800TΩ)

Moisture Insulation Resistance, per MIL-I-46058C

4.7 x 1010 ohms (47GΩ)

Fungus Resistance, per ASTM G21


*Fusion “H” style bulb recommended


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UV curable conformal coating | UV Curable UV 40 Solar | Distributor | Dealer in India