HumiSeal®️ 1A33 is a single-component polyurethane conformal coating suitable for general printed circuit board applications. HumiSeal®️ 1A33 is also available in ready-to-use formulations with various viscosity ranges, compatible with different application methods. Once fully cured, the properties of 1A33 and its ready-to-use versions are equivalent.
HumiSeal®️ 1A33 coating meets the following requirements:
• MIL-I-46058C
• IPC-CC-830B
• IEC60664-3
• UL746E and UL94 V-0
• Compliant with REACH and RoHS Directive EU 2015/863
• Recognized under UL file number E105698
• Passes salt spray testing according to IEC61086 / IEC60068-2-11
HumiSeal®️ 1A33 offers the following advantages:
• Contains no free isocyanates
• Provides protection against moisture, salt/corrosive environments, and contaminants
• Easy application with automated systems
• Low moisture vapor permeability
• Fluoresces under UV light for easy inspection and is easily repairable
• Excellent chemical resistance
• Available in various ready-to-use formulations for different application methods
| Product | Viscosity
(cPs) | Solids
(%) | Density
(g/cm3) | VOC
(g/L) | Shelf Life
(DOM, Aylar) |
|---|
| 1A33 |
180 ± 20 |
44 ± 2 |
0.95 ± 0.02 |
532.0 |
24 |
| 1A33/600/AP2 |
22.5 ± 5 |
30 ± 3 |
0.945 ± 0.025 |
661.5 |
12 |
| 1A33 PB 23 CPS |
23 ± 5 |
34 ± 1 |
0.92 ± 0.02 |
607.2 |
12 |
| 1A33 PB 48.3 CPS |
48.3 ± 5 |
38 ± 1 |
0.93 ± 0.02 |
576.6 |
12 |
| 1A33 PB 55 CPS |
55 ± 5 |
39 ± 1.5 |
0.93 ± 0.03 |
567.3 |
12 |
| 1A33 PB 64 CPS |
64 ± 5 |
39 ± 2 |
0.93 ± 0.02 |
567.3 |
24 |
| 1A33 PB 80 CPS |
80 ± 5 |
40 ± 2 |
0.94 ± 0.02 |
564.0 |
24 |
| 1A33 PB 100 CPS |
100 ± 5 |
41 ± 2 |
0.94 ± 0.02 |
554.6 |
24 |
| 1A33/521 PB 25 CPS |
25 ± 3 |
36 ± 1 |
0.93 ± 0.02 |
595.2 |
24 |
| 1A33/521 PB 65 CPS |
67.5 ± 2.5 |
40 ± 2 |
0.93 ± 0.02 |
558.0 |
24 |
Tack-free time: 15 minutes
Typical Properties of HumiSeal®️ 1A33 and Ready-to-Use Products in Cured State
Recommended coating thickness: 25–75 microns
Time required to achieve optimal properties: 30 days at room temperature, 30 hours at 76°C, 20 hours at 88°C
Recommended remover: HumiSeal®️ Stripper 1063
Thermal shock (50 cycles according to MIL-I-46058C): -65°C to 125°C
Substrate cleanliness is extremely important for the successful application of conformal coatings. Surfaces must be free from moisture, dirt, oils, flux residues, and all other contaminants. Contaminants beneath the coating may lead to issues that can cause assembly failures.
Store in tightly sealed containers, away from excessive heat or cold. HumiSeal®️ products can be stored at temperatures between 0°C and 35°C. Before use, allow the product to reach ambient temperature (18°C to 32°C) for 24 hours.
