HumiSeal® 1A33LOS is a single component, polyurethane conformal coating, suitable for general printed circuit board applications. HumiSeal® 1A33LOS is a development of HumiSeal® 1A33 with reduced odor levels and lower toxicity solvents. After complete cure, the properties of HumiSeal® 1A33 LOS and HumiSeal® 1A33 are comparable. HumiSeal® 1A33LOS contains no free isocyanates and will fluoresce under UV light for inspection purposes. HumiSeal® 1A33LOS is compliant with RoHS Directive 2015/863/EU and China RoHS 2.
| Product Specification | |
| Density, per ASTM D1475 | 0.92 ± 0.02 g/cm3 |
| Solids Content, % by weight per Fed-Std-141, Meth. 4044 | 44 ± 2 % |
| Viscosity, per Fed-Std-141, Meth. 4287 | 195 ± 65 centipoise |
| VOC | 512 grams/lire |
| Recommended Coating Thickness | 25 – 75 microns |
| Drying Time to Handle per Fed-Std-141, Meth. 4061 | 30 minutes |
| Optional Curing Conditions to Reach Optimum Properties | 30 days at RT30 hours @ 76°C 20 hours @ 88°C |
| Recommended Thinner (dipping, brushing) | HumiSeal Thinner 905 |
| 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 | 193 ppm/°C |
| Glass Transition Temperature – DSC | 26°C |
| Modulus – DMA | 27.2 MPa |
| Flammability, per UL 94 | Pending |
| Dielectric Withstand Voltage, per MIL-I-46058C | >1500 volts |
| Insulation Resistance, per MIL-I-46058C | 2.0 x 1014 ohms (200TΩ) |
| Moisture Insulation Resistance, per MIL-I-46058C | 1.6 x 1010 ohms (16GΩ) |
| CTI, PLC per UL746A @ 600 volts | 0 |
