HumiSeal 1A33NS Urethane Conformal Coating
Harmonization Code : 3906909090 | Acrylic polymers in primary form Others>Others
Main features
- Fluoresces under UV light for inspection
- Low moisture vapor permeability
- Fast drying to handle (15 minutes)
Product Description
HumiSeal 1A33NS is a high-performance, toluene-free polyurethane coating designed for the most demanding electronic environments. Offering a safer, isocyanate-free alternative for the workshop, it provides a robust shield against moisture and chemical contaminants. Whether for automotive sensors or military hardware, 1A33NS ensures reliable performance with the added benefit of UV traceability and UL-certified protection.
Product Key Features
- Single-component polyurethane conformal coating
- Toluene-free formulation
- No free isocyanates
- Fluoresces under UV light for inspection
- Fast drying to handle (15 minutes)
- Low moisture vapor permeability
- RoHS Directive 2002/95/EC compliant
Applications
- General printed circuit board (PCB) protection
- Consumer electronics assemblies
- Industrial electronics
- Telecommunications equipment
HS-1A33NS
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Shipping in 6 weeksPackaging
TDS, SDS & Technical Documents
- 1A33NS TDS
Technical Specifications
General Properties
Physical Properties
Thermal Properties
Electrical Properties
Additional Information
Learn More About HumiSeal® 1A33NS
Application Methods
HumiSeal® 1A33NS can be applied using standard conformal coating techniques. Proper substrate cleanliness is essential to ensure coating performance and reliability.
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Dipping: Viscosity may be adjusted using HumiSeal® Thinner 521 to achieve a uniform film. Use a controlled immersion and withdrawal rate of 5–15 cm/min. Monitor viscosity regularly using a Zahn or Ford cup.
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Spraying: Apply using conventional spray equipment with adequate ventilation. A typical starting ratio is 1:1 by volume of coating to Thinner 521, adjusted as needed to achieve a pinhole-free film.
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Brushing: Suitable for localized coating or repair. Film uniformity depends on component density and operator technique.
Important Notes:
- Surfaces must be free of moisture, grease, flux residues, and contaminants
- Viscosity should be checked regularly during application
- Perform process validation prior to full production use
Application Compatibility
HumiSeal® 1A33NS is compatible with materials commonly used in electronic assemblies.
Compatible With:
✔ FR-4 and standard PCB substrates
✔ Copper, tin, nickel, and plated finishes
✔ Most electronic components
✔ Automated and manual coating equipment
Not Recommended For:
✖ Contaminated or moisture-laden substrates
✖ Use near open flames or ignition sources
Additional Guidance:
UV fluorescence enables easy inspection and verification of coating coverage. Always confirm compatibility with assembly materials and processes.
Safety and Handling Precautions ⚠️
- Use only in well-ventilated areas
- Avoid inhalation of vapors or spray mist
- Avoid contact with skin and eyes
- Keep away from sparks, heat, and open flames
- Follow all local and national safety regulations
Always consult the Safety Data Sheet (SDS) before use.
Storage Recommendations 📦
Store HumiSeal® 1A33NS in tightly closed containers away from excessive heat or cold. Recommended storage temperature is 0–35°C. Allow the product to equilibrate for 24 hours at 18–32°C prior to use.
Compliance You Can Trust ✅
HumiSeal® 1A33NS meets key industry and regulatory requirements:
✔ RoHS Directive 2002/95/EC compliant
✔ Toluene-free formulation
✔ No free isocyanates
✔ UV fluorescent for inspection and quality control
