HumiSeal UV500 is a high solids UV dual cure elastomeric acrylate conformal coating. HumiSeal® UV500 exhibits excellent flexibility, moisture resistance, and electrical insulation properties as well as good chemical resistance. The formulation allows chemical stripping using a dedicated stripper. HumiSeal® UV500 is tack free after exposure to UV light and the secondary moisture cure mechanism will fully cure any unexposed areas of the coating within 7 days at ambient conditions. Cured HumiSeal® UV500 has a higher flexibility compared to other UV-curable conformal coatings, giving improved performance in thermal cycling tests. The coating fluoresces under UV light to allow coating inspection and can be applied by all selective coating equipment. HumiSeal UV500 is recognized under UL File Number E105698. HumiSeal® UV500 is compliant with EU RoHS Directive 2015/863 and China RoHS 2.
Density | 1.0 to 1.1 g/cm³ |
Minimum Solids Content | 98% |
Viscosity, per Fed-Std-141, Meth. 4287 | 275 to 375 centipoise |
Recommended Coating Thickness | 25 – 125 microns |
Recommended UV Cure | See Curing Below |
Glass Transition Temperature – DSC | 43°C |
Coefficient of Thermal Expansion – TMA | 137ppm/°C Below Tg 311ppm/°C Above Tg |
Modulus – DMA | 0.4MPa @ 25°C |
Flammability per UL94 | V-0 |
Thermal Conductivity | 0.505 W/mK |