Humiseal 1R32
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 ± .02 g/cm3 |
| Solids Content, % by weight per Fed-Std-141, Meth. 4044 | 35 ± 2 % |
| Viscosity, per Fed-Std-141, Meth. 4287 | 220 ± 30 centipoise |
| VOC | 600 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 505 |
| Recommended Thinner (spraying) | HumiSeal® Thinner 521 |
| Recommended Stripper | HumiSeal® Stripper 1080 |
| Shelf Life at Room Temperature, DOM | 24 months |
| Thermal Shock, 50 cycles per MIL-I-46058C | -65°C to 125°C |
| Coefficient of Thermal Expansion – TMA |
170 ppm/°C below Tg
340 ppm/°C above Tg |
| Glass Transition Temperature – DSC | 14°C |
| Modulus – DMA |
2000 MPa @ -40°C
1050 MPa @ 20°C 8.5 MPa @ 60°C |
| Dielectric Withstand Voltage, per MIL-I-46058C | >1500 volts |
| Dielectric Breakdown Voltage, per ASTM D149 | 7500 volts |
| Dielectric Constant, at 1MHz and 25°C per ASTM D150-65T | 2.5 |
| Dissipation Factor, at 1MHz and 25°C, per ASTM D150-98 | 0.01 |
| Insulation Resistance, per MIL-I-46058C | 8.0 x 1014 ohms (800TΩ) |
| Moisture Insulation Resistance, per MIL-I-46058C | 6.0 x 1010 ohms (60GΩ) |
| Fungus Resistance, per ASTM G21 | Passes |
Application of HumiSeal® 1R32
For optimal application of a conformal coating, the cleanliness of the substrate is critical. Surfaces must be free moisture, dirt, wax, grease, flux residues, and all other contaminants. Any contamination trapped under the coating may lead to issues that could cause assembly failures.
Dipping
If necessary, reduce the viscosity of HumiSeal® 1R32 with HumiSeal® Thinner 505 to achieve a uniform film, based on the complexity, density, and configuration of components on the assembly. Once the optimal viscosity is achieved, ensure a controlled rate of immersion and withdrawal (5-15 cm/min) to promote even coating deposition. As the solvent evaporates during the application process, viscosity will increase and should be adjusted by adding small amounts of HumiSeal® Thinner 505. Regularly check viscosity in the dip tank using simple measuring devices like a Zahn or Ford viscosity cup.
Spraying
HumiSeal® 1R32 can be sprayed using conventional spraying equipment. Ensure the spraying environment is adequately ventilated to direct vapors and mist away the operator. Adding HumiSeal® Thinner 521 is crucial for achieving a uniform spray pattern, resulting in a pinhole-free film. The recommended ratio of HumiSeal® 1R32 to HumiSeal® Thinner 521 is 1:1 by volume, though adjustments may be necessary based on the type of spray equipment and operator technique.
Brushing
HumiSeal® 1R32 can be applied by brushing, with a small amount of HumiSeal® Thinner 505 added. The uniformity of the coating will depend on component density and the skill of the operator.
Storage
HumiSeal® 1R32 should be stored in tightly closed containers, away excessive heat or cold. Store at temperatures between 0 to 35°C. Before use, allow the product to equilibrate for 24 hours at a room temperature of 18 to 32°C.
Caution
The application of HumiSeal® Conformal Coatings should be conducted in compliance with local and national health and safety regulations. The solvents in HumiSeal® coatings are flammable; therefore, avoid using the material near open flames or sparks. Always apply in well-ventilated areas to prevent inhalation of vapors or spray. Avoid direct contact with skin and eyes. Consult the MSDS/SDS before use.
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