HumiSeal 1B15
4 5 (1 evaluate)Category: Acrylic Conformal Coating
Manufacturer: Humiseal
Packaging: 5L, 20L
Origin: UK or USA
Product Specification
| Density, per ASTM D1475 | 0.91 ± 0.02 g/cm³ |
| Solids Content, % by weight per Fed-Std-141, Meth. 4044 | 35 ± 3 % |
| Viscosity, per Fed-Std-141, Meth. 4287 | 470 ± 20 centipoise |
| VOC | 590 grams/litre |
| Drying Time to Handle per Fed-Std-141, Meth. 4061 | 10 minutes |
| Recommended Coating Thickness | 25 – 75 microns |
| Recommended Curing Conditions | 24 hrs @ RT or 30 min @ 76°C |
| Time Required to Reach Optimum Properties | 7 days |
| Recommended Thinner (dipping & brushing) | HumiSeal Thinner 503 |
| Recommended Thinner (spraying) | HumiSeal Thinner 521 |
| Recommended Stripper | HumiSeal Stripper 1080 |
| Shelf Life at Room Temperature, DOM | 18 months |
| Thermal Shock, 50 cycles per MIL-I-46058C | -65°C to 125°C |
| Coefficient of Thermal Expansion – TMA | 77 ppm/°C |
| Glass Transition Temperature – DSC | 15°C |
| Modulus – DMA | 69.5 MPa |
| Dielectric Withstand Voltage, volts per MIL-I-46058C | >1500 |
| Dielectric Constant, at 1MHz and 25°C per ASTM D150-98 | 2.03 |
| Dissipation Factor, at 1MHz and 25°C per ASTM D150-98 | 0.01 |
| Insulation Resistance, per MIL-I-46058C | 3.5 x 1014 ohms (350TΩ) |
| Moisture Insulation Resistance, per MIL-I-46058C | 4.0 x 1010 ohms (40GΩ) |
| Fungus Resistance, per ASTM G21 | Passes |
HumiSeal® 1B15 is a single-component, fast-drying acrylic conformal coating that is easily repaired. This coating complies with the RoHS Directive 2002/95/EC, ensuring it meets environmental safety standards.
Application of HumiSeal® 1B15
For successful application of a conformal coating, it is crucial to ensure that the substrate is clean and free moisture, dirt, wax, grease, flux residues, and other contaminants. Any contamination underneath the coating could lead to adhesion problems or assembly failures.
Dipping
Depending on the assembly's complexity, component density, and configuration, you may need to reduce the viscosity of HumiSeal® 1B15 using HumiSeal® Thinner 503 to achieve a uniform film. Once the optimal viscosity is determined, a controlled rate of immersion and withdrawal (5-15 cm/min) will help ensure consistent deposition and a uniform coating. As the solvent evaporates during application, viscosity will increase and should be adjusted by adding small amounts of HumiSeal® Thinner 503. Regularly check the viscosity in the dip tank using a Zahn or Ford viscosity cup.
Spraying
HumiSeal® 1B15 can be applied using conventional spraying equipment in an adequately ventilated environment to prevent vapor and mist buildup. The addition of HumiSeal® Thinner 521 is necessary to achieve a uniform spray pattern and avoid pinholes in the film. The recommended thinning ratio of HumiSeal® 1B15 to HumiSeal® Thinner 521 is 1:1 by volume, though it may need adjustment depending on the specific spray equipment and technique.
Brushing
HumiSeal® 1B15 can also be applied by brushing, with a small amount of HumiSeal® Thinner 503 for improved flow. The uniformity of the coating depends on the component density and the operator’s technique.
Storage
Store HumiSeal® 1B15 away extreme temperatures in tightly closed containers. The product should be kept at temperatures between 0 to 35°C. Allow the product to equilibrate at room temperature (18-32°C) for 24 hours before use.
Caution
Ensure that the application of HumiSeal® Conformal Coatings complies with local and national health and safety regulations. The solvents in these coatings are flammable, so avoid using the material near open flames or sparks. Always apply in well-ventilated areas to avoid inhalation of vapors or spray, and prevent skin or eye contact. Review the MSDS/SDS before use.
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