HumiSeal® 2A64 is a two component polyurethane conformal coating supplied as Parts A and B, suitable for general printed circuit board applications. HumiSeal® 2A64 is characterized by high solids and low viscosity for ease of application and processing, and it fluoresces under UV light for inspection purposes. HumiSeal®2A64 coating is MIL-I-46058C qualified, and IPC-CC-830 and RoHS Directive 2011/65/EC compliant.
Typical Properties
Product Specification
Density, per ASTM D1475
1.07 ± 0.03 g/cm3
Solids Content, % by weight per Fed-Std-141, Meth. 4044
55 ± 5 %
Viscosity, per Fed-Std-141, Meth. 4287
130 ± 50 centipoise
VOC
501 grams/litre
Recommended Coating Thickness
25 – 75 microns
Drying Time to Handle per Fed-Std-141, Meth. 4061
15 minutes
Optional Curing Conditions to Reach Optimum Properties
3 hrs @ 76°C
Recommended Thinner
HumiSeal® Thinner 64
Recommended Stripper
HumiSeal® Stripper 1072
Pot Life at Room Temperature
8 hours
Shelf Life at Room Temperature, DOM
12 months
Thermal Shock, 50 cycles per MIL-I-46058C
-65°C to 125°C
Coefficient of Thermal Expansion – TMA
82 ppm/°C Below Tg
255 ppm/°C Above Tg
Glass Transition Temperature – DSC
12°C
Modulus – DMA
4101 MPa @ -40ºC
2777 MPa @ 25ºC
2 MPa @ 80ºC
Flammability, per MIL-I-46058C
Self-Extinguishing
Dielectric Withstand Voltage, per MIL-I-46058C
>1500 volts
Dielectric Breakdown Voltage, per ASTM D149
3500 volts
Dielectric Constant, at 1MHz and 25°C per ASTM D150-98
3.5
Dissipation Factor, at 1MHz and 25°C per ASTM D150-98
