Aerosol 1A33
Model No: 1A33

HumiSeal® 1A33 Aerosol Conformal Coating is a one component, fast curing, urethane coating that is used for circuit board applications. It is environmentally safe and fluoresces under UV light to aid inspection.

 Product Enquiry

HumiSeal® 1A33 aerosol conformal coating is:

  • urethane chemistry
  • fast drying
  • single component
  • IPC-CC-830 compliant
  • UL file number E105698


HumiSeal® 1A33 aerosol conformal coating has:

  • excellent moisture and environmental protection for printed circuit assemblies
  • excellent flexibility
  • fluorescence under UV light for ease of inspection
  • reworkability with ease
  • RoHS Directive 2011/65/EC compliance


Application of HumiSeal® 1A33 aerosol Conformal Coating

  • Allow 48 hours minimum to reach room temperature before using cans stored or received during cold weather.
  • When applied in conditions of high ambient humidity, blushing (cloudy white film) may appear.  Heating the coated assembly in an oven for 1/2 hour at 76°C eliminates this condition.
  • Surface must be cleaned of dirt, wax, grease, flux residues and all similar contaminants for successful application of the coating.
  • Mask areas not requiring coating from overspray using suitable non-silicone masking methods or materials.
  • Shake can vigorously before using and repeat frequently during use.
  • Best results are obtained by spraying from a distance of 30 – 40 cm in light even coats.   A film thickness of 25 – 75 microns is sufficient to provide protection.
  • To clean nozzle after use, hold can upside down, then press nozzle for a few seconds.



Product Specification

Solids Content, % by weight per Fed-Std-141, Meth. 4044

12 ± 1 %


462 grams/liter

Recommended Coating Thickness

25 – 75 microns

Drying Time to Handle per Fed-Std-141, Meth. 4061

10 minutes

Time Required to Reach Optimum Properties

30 days @ RT, 30 hours @ 76°C, 20 hours @ 88°C

Shelf Life, DOM

24 months

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

-65°C to 125°C

Coefficient of Thermal Expansion – TMA

170 ppm/°C

Glass Transition Temperature – DSC


Modulus – DMA

18.1 MPa

Dielectric Withstand Voltage, per MIL-I-46058C

>1500 volts

Dielectric Breakdown Voltage, per ASTM D149

7500 volts

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

2.0 x 1014  ohms (200TΩ)

Moisture Insulation Resistance, per MIL-I-46058C

1.2 x 1010  ohms (12GΩ)

CTI, PLC per UL746E @ 600 volts


Recommended Stripper

Humiseal® Stripper 1063