HumiSeal® 1A33/521 PB65 is a single component polyurethane conformal coating that has been formulated for use in automated spray equipment without requiring additional thinning. HumiSeal®
1A33/521 PB65 demonstrates excellent flexibility, fluoresces under UV light for ease of inspection and is easily repaired.
Product Specifications
Density, per ASTM D1475
0.93 ± 0.02 g/cm³
Solids Content, % by weight per Fed-Std-141, Meth. 4044
40 ± 2 %
Viscosity, per Fed-Std-141, Meth. 4287
65 ± 5 centipoise
VOC
559 grams/litre
Drying Time to Handle per Fed-Std-141, Meth. 4061
15 minutes
Recommended Coating Thickness
25 – 75 microns
Optional Curing Conditions to Reach Optimum Properties
30 days at RT
30 hours @ 76°C
20 hours @ 88°C
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
193 ppm/°C
Glass Transition Temperature – DSC
26°C
Modulus – DMA
27.2 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
