Aerosol conformal coating 1B18
Model No: 1B18

HumiSeal® 1B18 Acrylic Conformal Coating is a single component, fast curing acrylic coating that is used for circuit assemblies and can be easily repaired. It offers excellent electrical properties, flexibility, and fluoresces under UV light to aid inspection. It can be applied by spraying, brushing, or dipping methods.

 Product Enquiry

HumiSeal® 1B18 aerosol conformal coating is:

  • an acrylic chemistry
  • fast drying
  • single component
  • IPC-CC-830 compliant


HumiSeal® 1B18 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® 1B18 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

Density, per ASTM D1475

0.74 ± 0.02 g/cm³

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

7 ± 1 %


687.5 grams/liter

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

30 minutes

Recommended Coating Thickness

25 -75 microns

Recommended Curing Conditions

24 hrs @ RT or 2 hrs @ 76°C

Time Required to Reach Optimum Properties

7 days

Recommended Stripper

HumiSeal® Stripper 1080, 1080A

Shelf Life at Room Temperature, DOM

24 months

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

-65°C to 125°C

Coefficient of Thermal Expansion – TMA

67 ppm/°C

Glass Transition Temperature – DSC


Modulus – DMA

11.1 MPa

Flammability, per UL 94


Dielectric Withstand Voltage, per MIL-I-46058C

>1500 volts

Dielectric Breakdown Voltage, per ASTM D149

6300 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

5.5 x 1014 ohms (550TΩ)

Moisture Insulation Resistance, per MIL-I-46058C

7.0 x 1010 ohms (70GΩ)

Fungus Resistance, per ASTM G21