HumiSeal® 1R32A-2 is a fast-drying, single-component acrylic conformal coating, specially formulated to provide improved adhesion to typical substrates while offering excellent moisture and environmental protection for printed circuit assemblies. After full curing, HumiSeal® 1R32A-2 performs comparably to its pre-blended variants, ensuring superior protection and durability.
Advantages of HumiSeal® 1R32A-2:
- Enhanced adhesion to typical substrates
- Strong protection against moisture and contaminants
- Easy application with automated systems
- Low moisture vapor permeability
- Low odor during use
- Fluoresces under UV light for easy inspection and repair
- Easily removable using HumiSeal Strippers
- Available in pre-blends for different application methods without additional dilution
Compliance and Certifications:
- REACH and RoHS Directive EU 2015/863 compliant
- IPC-CC-830 compliant
- Meets China Standard GB30981-2020
- UL File Number E105698 recognized
- Contains no REACH Substances of Very High Concern (SVHC)
Application of HumiSeal® 1R32A-2 Pre-Blends
HumiSeal® 1R32A-2 can be applied to cleaned substrates or those assembled with low residue “no clean” materials. Proper testing should be conducted to ensure compatibility between the coating and the assembly materials. HumiSeal® 1R32A-2 Pre-Blends are diluted to the appropriate viscosity for immediate use, requiring no further dilution. Contact HumiSeal® Technical Support for assistance with Pre-Blends and application equipment.
Choose HumiSeal® 1R32A-2 for superior adhesion and protection in your printed circuit assemblies.
About Prostech
Prostech offers specialty materials (adhesives, tapes, thermal interface materials, insulating materials, sealants, PCB protection materials, …) along with manufacturing solutions. We proudly serve a wide range of industries and are an authorized distributor for leading global manufacturers of industrial materials and equipment. Our product range is designed to deliver customized solutions that address each customer’s unique needs.
With years of experience and a successful project history, we are confident in our ability to provide comprehensive material solutions. These solutions effectively tackle the challenges manufacturers face. To explore our full product catalog, simply click here. Our dedicated team is ready to assist with:
- Provide quotation, sample, TDS/MSDS, and technical consultation
- Testing sample quality and verifying product compatibility in our laboratory
- Customizing material formulas for special applications
- Adapting product sizes, quantities, and packaging to meet specific needs
- Offering expert advice on suitable equipment and automation processes
- Delivering technical training and on-site support for optimal product use
Moreover, Prostech ensures the safe and accurate global delivery of all materials, including “dangerous goods”, in compliance with legal regulations. For personalized technical support or to receive a quotation, please contact us today.
| Product | Viscosity (CPS) | Solids Content (%) | Density (g/cm³) | VOC (g/L) | Shelf Life (DOM, Months) |
| 1R32A-2 | 220 ± 30 | 29 ± 3 | 0.91 ± 0.02 | 646.1 | 24 |
| 1R32A-2 PB 65 | 65 ± 5 | 21 ± 1.5 | 0.93 ± 0.02 | 734.7 | 24 |
| 1R32A-2 PB 53 | 53 ± 5 | 19 ± 1 | 0.93 ± 0.02 | 753.3 | 24 |
| 1R32A-2/505 PB90 | 90 ± 5 | 25 ± 2 | 0.90 ± 0.02 | 675 | 12 |
| 1R32A-2/505 PB65 | 65 ± 5 | 24 ± 2 | 0.89 ± 0.02 | 676.4 | 12 |
| 1R32A-2/505 PB40 | 40 ± 5 | 21 ± 1 | 0.88 ± 0.02 | 695.2 | 12 |
| 1R32A-2/600 PB80 | 80 ± 5 | 23 ± 2 | 0.93 ± 0.02 | 716.1 | 12 |
| 1R32A-2/600 PB40 | 40 ± 5 | 18 ± 2 | 0.94 ± 0.02 | 770.8 | 12 |
| 1R32A-2/600 PB23 | 23 ± 5 | 14.5 ± 2.5 | 0.94 ± 0.02 | 803.7 | 12 |
| 1R32A-2/673S PB150 | 130 ± 20 | 27 ± 2 | 0.92 ± 0.02 | 671.6 | 12 |
| 1R32A-2/673S PB65 | 65 ± 5 | 24 ± 1.5 | 0.91 ± 0.02 | 691.6 | 12 |
| 1R32A-2/73 PB40 | 40 ± 5 | 19.5 ± 2 | 0.90 ± 0.02 | 724.5 | 12 |
| Specification | Value |
| Recommended Coating Thickness | 25 – 75 microns |
| Recommended Curing Conditions | 24 hrs @ RT or 2 hrs @ 76°C |
| Time Required to Reach Optimum Properties | 7 days |
| Recommended Stripper | HumiSeal® Stripper 1080, 1080EU |
| 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 |
| Flammability, per UL 94 | V-0 |
| 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 | 2.5 |
| Dissipation Factor, at 1MHz and 25°C, per ASTM D150 | 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 |
