1A33 Aerosol

1A33 Aerosol

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 1A33 aerosolConformal Coating

  1. Allow 48 hours minimum to reach room temperature before using cans stored or received during cold weather.
  2. 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.
  3. Surface must be cleaned of dirt, wax, grease, flux residues and all similar contaminants for successful application of the coating.
  4. Mask areas not requiring coating from overspray using suitable non-silicone masking methods or materials.
  5. Shake can vigorously before using and repeat frequently during use.
  6. 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.
  7. 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 %
VOC 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 28°C
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 3.6
Dissipation Factor, at 1MHz and 25°C per ASTM D150-98 0.03
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 0
Recommended Stripper Humiseal® Stripper 1063
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