Apply HumiSeal conformal coating
Applying HumiSeal conformal coating, produced by Chase Corporation, requires controlled processes to ensure proper protection, adhesion, and reliability. In Montaje de PCB, Montaje SMT, y Montaje de PCB llave en mano, correct application is critical to achieve consistent coating performance.

Surface preparation (most important step)
Antes de aplicar Revestimiento conforme, the PCB must be thoroughly prepared:
- Remove flux residues, oils, dust, and contaminants
- Use approved cleaning methods (solvent cleaning, ultrasonic, or deionized water)
- Ensure the board is completely dry
Poor cleaning is one of the main causes of coating defects in Montaje de PCB.
Masking (protect no-coat areas)
Certain areas must not be coated:
- Conectores y tomas
- Test points
- Switches and contact surfaces
Use tapes, boots, or masking materials to protect these areas during Montaje SMT.
Choose the application method
HumiSeal coatings can be applied using several methods depending on production volume:
Spray coating (manual or automated)
- Most common method in Montaje de PCB
- Provides uniform coverage
- Suitable for both low and high volumes
Recubrimiento selectivo (automatizado)
- High precision using programmable machines
- Ideal for Montaje de PCB llave en mano líneas de producción
- Reduce las necesidades de enmascaramiento
Revestimiento por inmersión
- PCB is immersed in coating liquid
- Ensures full coverage
- May result in thicker coating
Revestimiento con cepillo
- Used for small batches or rework
- Less consistent than automated methods
Control del espesor del revestimiento
Maintain proper thickness (typically 25–75 µm):
- Avoid too thin (insufficient protection)
- Avoid too thick (risk of cracking or heat issues)
Thickness control is essential for consistent quality in Montaje SMT.
Proceso de curado
After application, the coating must be cured:
- Secado al aire (common for acrylic coatings)
- Curado por calor (for urethane or epoxy)
- Curado UV (for UV-curable HumiSeal coatings)
Follow manufacturer specifications for time and temperature to ensure full curing.
Inspección y control de calidad
After curing, inspect the coating:
- Use UV light to verify coverage (if UV tracer is present)
- Check for bubbles, voids, or missed areas
- Ensure no overcoating on masked areas
Inspection ensures coating quality in Montaje de PCB llave en mano.
Buenas prácticas
- Maintain clean working environment
- Control humidity and temperature during application
- Use proper equipment calibration
- Train operators on coating techniques
Conclusión
Applying HumiSeal conformal coating involves careful surface preparation, proper masking, controlled application, and thorough curing. In Montaje de PCB, Montaje SMT, y Montaje de PCB llave en mano, following these steps ensures optimal protection, improved reliability, and long-term performance of electronic products.
We support HumiSeal and equivalent conformal coating solutions for your PCBA projects.
Obtenga un presupuesto de revestimiento de conformación
Garantice la fiabilidad a largo plazo de sus placas de circuito impreso con nuestras soluciones de revestimiento. Empiece aquí.
Envíenos sus requisitos y obtenga una respuesta rápida de nuestro equipo de ingenieros.
✔ Respuesta en 24 horas ✔ Soporte de ingeniería ✔ Producción en serie y a pequeña escala
Shenzhen Tengxinjie Electronics Co.


