HumiSeal® 1B31 conformal coating is an acrylic chemistry, fast drying and single component conformal coating. It has excellent moisture and environmental protection for printed circuit assemblies, excellent flexibility, fluorescence under UV light for ease of inspection and reworkability with ease. It has MIL-I-46058C qualification, IPC-CC-830 compliance and RoHS directive 2015/863/EU.
Product Specification
Density, per ASTM D1475
0.91 ± 0.02 g/cm3
Solids Content, % by weight per Fed-Std-141, Meth. 4044
35 ± 3 %
Viscosity, per Fed-Std-141, Meth. 4287
200 ± 15 centipoise
VOC
592 grams/liter
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, 521EU
Recommended Stripper
Stripper 1080, 1080EU
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 Tg340 ppm/°C above Tg
Glass Transition Temperature – DSC
14°C
Modulus – DMA
2000 MPa @ -40°C1050 MPa @ 20°C8.5 MPa @ 60°C
Flammability, per MIL-I-46058C
Self-Extinguishing
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
2.5
Dissipation Factor, at 1MHz and 25°C per ASTM D150-98
