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.
| 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 | 0.024 |
| Insulation Resistance, per MIL-I-46058C | 4.5 x 1014 ohms (450TΩ) |
| Moisture Insulation Resistance, per MIL-I-46058C | 4.8 x 1010 ohms (48GΩ) |
| Fungus Resistance, per ASTM G21 | Passes |
