HumiSeal® 1A27 is a single component, polyurethane conformal coating, suitable for general printed circuit board applications. HumiSeal® 1A27 contains no free isocyanates. HumiSeal® 1A27 coating is RoHS Directive 2002/95/EC compliant and recognized under UL File Number E105698.
Product Specification
Density, per ASTM D1475
0.96 ± 0.02 g/cm³
Solids Content, % by weight per Fed-Std-141, Meth. 4044
50 ± 3 %
Viscosity, per Fed-Std-141, Meth. 4287
3000 ± 1000 centipoise
VOC
480 grams/litre
Recommended Coating Thickness
25 – 75
Drying Time to Handle per Fed-Std-141, Meth. 4061
30 minutes
Optional Curing Conditions to Reach Optimum Properties
30 days at RT
30 hours @ 76°C
20 hours @ 88°C
Recommended Thinner (spraying)
HumiSeal Thinner 521
Recommended Stripper
HumiSeal Stripper 1063
Shelf Life at Room Temperature, DOM
24 months
Thermal Shock, 50 cycles per MIL-I-46058C
-65° to 125°C
Coefficient of Thermal Expansion – TMA
170 ppm/°C
Glass Transition Temperature – DSC
28°C
Modulus – DMA
18.1 MPa
Flammability, per UL 94
V-0
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
