The HumiSeal UV40-250 coating is a single-component, polyurethane coating that cures under UV light. It boasts high solids, flexibility, surface hardness, and resistance to moisture and chemicals. Additionally, it fluoresces under UV light for easy inspection and can be applied using spray methods. Available in a 1 L can.
FEATURES
single component
high solids
UV curable
acrylated polyurethane
HumiSeal UV40-250 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 2015/863/EU
China Standard GB30981-2020
Product Specification
Density
1.06 g/cm3
Minimum Solids Content
95 %
Viscosity, per Fed-Std-141, Meth. 4287
300 ± 50 centipoise
Recommended Coating Thickness
25 – 125 microns
Recommended UV Dose*
see curing section above
Shelf Life at Room Temperature, DOM
6 months
Recommended Stripper**
HumiSeal® Stripper 1100
Thermal Shock, 50 cycles per MIL-I-46058C
-65°C to 125°C
Glass Transition Temperature – DSC
26°C
Coefficient of Thermal Expansion
112 ppm/°C Below Tg 283 ppm/°C Above Tg
Modulus – DMA
1060 MPa -60°C
Flammability, per UL-94
V-0
Dielectric Withstand Voltage, per MIL-I-46058C
>1500 volts
Dielectric Constant, at 1MHz and 25°C per ASTM D150-98
2.41
Dissipation Factor, at 1MHz and 25°C per ASTM D150-98
