Acrylics Conformal coating 1R32A-2
Model No: 1R32A-2

HumiSeal® 1R32A-2 is a fast drying, single component acrylic coating, formulated for improved adhesion to typical substrates while providing excellent moisture and environmental protection for printed circuit assemblies. HumiSeal® 1R32A-2 fluorescence under UV light for ease of inspection and is easily repaired.

 Product Enquiry

Cleanliness of the substrate is of extreme importance for the successful application of a conformal coating. Surfaces must be free of moisture, dirt, wax, grease, flux residues and all other contaminants. Contamination under the coating could cause problems that may lead to assembly failures.


Product Specification

Density, per ASTM D1475

0.91 ± 0.02 g/cm³

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

35 ± 2 %

Viscosity, per Fed-Std-141, Meth. 4287

220 ± 30 centipoise


600 grams/litre

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

10 minutes

Recommended Coating Thickness

25 – 75 microns

Recommended Curing Conditions

24 hrs @ RT or 30 min @ 76°C

Time Required to Reach Optimum Properties

7 days

Recommended Thinner (dipping & brushing)

HumiSeal Thinner 503

Recommended Thinner (spraying)

HumiSeal Thinner 521

Recommended Stripper

HumiSeal Stripper 1080

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

170 ppm/°C below Tg

340 ppm/°C above Tg

Glass Transition Temperature – DSC


Modulus – DMA

2000 MPa @ -40°C

1050 MPa @ 20°C

8.5 MPa @ 60°C

Flammability, per UL 94


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

8.0 x 1014 ohms (800TΩ)

Moisture Insulation Resistance, per MIL-I-46058C

6.0 x 1010 ohms (60GΩ)

Fungus Resistance, per ASTM G21