Humiseal 2A64 | Urethane Conformal Coating
Harmonization Code : |
Main features
- Exceptional Electrical Insulation
- Easy Quality Control
- High environmental resistance
Product Description
HumiSeal® 2A64 is a two-component polyurethane conformal coating supplied as Parts A and B for general PCB applications.
HumiSeal® 2A64 offers high solids and low viscosity, making it easy to apply by brushing, dipping, or spraying. The coating fluoresces under UV light to allow quick inspection and is qualified to MIL-I-46058C, compliant with IPC-CC-830 and RoHS Directive 2011/65/EU.
Mixed it has a density of about 1.07 g/cm³, viscosity of 130 cP, and solids of 55% by weight. Recommended film thickness is 25–75 µm. It is dry-to-handle in about 15 minutes and reaches full properties after curing 3 hours at 76 °C. Electrical performance is strong, with dielectric breakdown of 3,500 V, insulation resistance of 4.5×10¹⁴ Ω, and moisture insulation resistance of 4.8×10¹⁰ Ω.
The product is mixed 1:1 by volume, has an 8-hour pot life, and should be allowed to settle 30 minutes after mixing. It withstands −65 °C to +125 °C in thermal shock testing and is self-extinguishing per MIL-I-46058C. Shelf life is 12 months when stored between 0–35 °C.
Target applications:
- PCB assembly protection requiring thin, uniform coatings
- Automotive and industrial control modules exposed to moisture and contaminants
- High-reliability electronics needing strong dielectric and insulation resistance
- Assemblies requiring UV inspection for quality control
- Processes using brush, dip, or spray application
HS-2A64
Unlike other products we offer, the products listed on this page cannot currently be ordered directly from the website.
Shipping in 12 weeksPackaging
TDS, SDS & Technical Documents
- 2A64
Technical Specifications
General Properties
Thermal Properties
Electrical Properties
Additional Information
Frequently Asked Questions About HumiSeal® 2A64
What are typical applications for HumiSeal® 2A64?
HumiSeal® 2A64 is used for protecting printed circuit boards in high-reliability electronics requiring moisture, chemical, and electrical insulation.
- Electronics manufacturing (PCB assembly)
- Automotive control modules
- Industrial electronics in harsh environments
Learn More About HumiSeal® 2A64
HumiSeal® 2A64 is a high-solids, two-component polyurethane coating that provides durable PCB protection, excellent dielectric insulation, and fast, UV-inspectable application.
Key Features at a Glance
- ✔ High solids, low viscosity
- ✔ Fast dry to handle
- ✔ Moisture & fungus resistant
Versatile Application Methods 🧰
Application Methods 🧰
Mix Parts A and B 1:1 by volume until homogenous (avoid vigorous mixing). Apply by:
- Brush: For precise applications and touch-ups
- Spray: With conventional spray equipment and recommended thinner
- Dip: For complete coverage of assemblies, adjusting viscosity as needed
Curing: 3 hrs at 76°C for full properties. Dry to handle in 15 minutes.
Application Compatibility ✔
Suitable for a variety of PCB types and electronic assemblies, including:
- Mission-critical electronics
- Moisture-sensitive devices
- High-vibration environments
UV tracer allows fast inspection under UV light to confirm coverage.
Repairable and Reworkable 🔁
Coated assemblies can be reworked using HumiSeal® Stripper 1072 or mechanical removal methods.
Reliable Across Environments 🌍
Performs consistently under -65°C to +125°C thermal shock conditions, providing moisture, fungus, and dielectric protection in harsh environments.
Compliance You Can Trust ✅
HumiSeal® 2A64 meets or exceeds key industry standards:
- MIL-I-46058C Qualified
- IPC-CC-830 Compliant
- RoHS Directive 2011/65/EU
- Fungus resistance per ASTM G21
- Self-extinguishing flammability
- High insulation resistance
Recently viewed products
LOCTITE ECI 1006 E&C
- Halogen free
- High conductivity
- Fine line screen printable
TMC-8020LS | Clear Optical Molding Compound
- LED Encapsulation
- Low stress
- Better reflow and Thermal shock
TG 4000 | Thermal Grease
- 0.005 Thermal Impedance
- 4.0 Thermal Conductivity
- 23μm BLT
LOCTITE SF 7387
- Activator
- Very low viscosity
- Promote cure of acrylic adhesives
FM-DA26 | Reactive PDMS - Monoterminal Hydroxy (Diol)
- Mono terminal
- 15,000 g/mol | 500 mPas
- Hydroxy (Diol) functional group
PIT1S-B | 1-mil Black Polyimide (Kapton) tape with Silicone Adhesive
- 1 mil polyimide Film
- Opaque black color through the film
- 3000V Breakdown Voltage
