HumiSeal 1A33 is a single component, polyurethane conformal coating, suitable for general printed circuit board applications. HumiSeal 1A33 contains no free isocyanates and fluoresces under UV light for inspection purposes. HumiSeal 1A33 coating is MIL-I-46058C qualified, IPC-CC-830B and RoHS Directive 2011/65/EC compliant, and recognized under UL File Number E105698.
FEATURES:
- Excellent moisture and environmental protection for printed circuit assemblies
- Fluorescence under UV light for ease of inspection
- Urethane chemistry
- Chemically resistant
- Single component
- Contains no free isocyanates
- Used in combination with Thinner 503/521
- MIL-I-46058C qualified
- RoHS directive 2015/863/EU
- Recognized under UL File Number E105698
Typical Properties
| Density, per ASTM D1475 | 0.95 ± 0.02 g/cm³ |
| Solids Content, % by weight per Fed-Std-141, Meth. 4044 | 44 ± 2 % |
| Viscosity, per Fed-Std-141, Meth. 4287 | 180 ± 20 centipoise |
| 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 | 30 days at RT |
| 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 |
| Flammability, per UL 94 | V-0 |
