UV3101-M UV/moisture cure Conformal Coating

UV3101-M is a single-component, UV-curable, acrylated polyurethane conformal coating that possesses excellent chemical resistance, thermal shock resistance, and moisture resistance. The material is tack-free after exposure to UV light. A secondary moisture cure mechanism will cure unexposed areas of the coating at ambient conditions. This coating fluoresces a bright blue when exposed to UV light (365nm) for easy inspection of coating coverage.

Features and benefits

  • Secondary moisture cure
  • Solvent-free, Halogen-free, Low odor
  • Excellent moisture, heat, and chemical resistance.
  • Excellent adhesion
  • Complies to the RoHS directive 2015/863/EU and 2011/65/EU.



Properties UV3101-M
Composition Acrylated Urethane
Appearance Translucent Liquid
Color Colorless / Fluorescent
Viscosity @ 25°C, cps 150 – 250
Specific Gravity 1.05


Properties UV3101-M
UV Curing:
Lamp type Mercury lamp
Intensity, mW/cm2 >50
Energy, mJ/cm2 > 1500
Humidity Curing:
Full Cure Time @ 25oC, hr 72


Properties UV3101-M
Durometer hardness, shore D 30
Tensile at break, MPa 5
Elongation at Break (%) 65
Modulus of Elasticity, MPa 761
Glass Transition Temp., (TMA) oC 60
CTE* (<Tg), ppm/K 105
CTE* (>Tg), ppm/K 208
Water absorption, 24hr, 250C, % 0.32
Dielectric Withstand Voltage, V > 1500
Dielectric Constant @1MHz 3.04
Dissipation Factor @1MHz 0.012
Volume Resistivity, 1.8 x 1016
Surface Resistance, ohm 1.0 x 1016
Comparative Tracking Index (CTI) 600
Recommended Operating Temperature, 0C -40 ~ 130

Technical Documents

UV3101-M Technical Data Sheet

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