Apply HumiSeal conformal coating
Applying HumiSeal conformal coating, produced by Chase Corporation, requires controlled processes to ensure proper protection, adhesion, and reliability. In Assemblaggio di PCB, Assemblaggio SMT, e Assemblaggio di PCB chiavi in mano, correct application is critical to achieve consistent coating performance.

Surface preparation (most important step)
Prima di applicare Rivestimento 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 Assemblaggio di PCB.
Masking (protect no-coat areas)
Certain areas must not be coated:
- Connettori e prese
- Test points
- Switches and contact surfaces
Use tapes, boots, or masking materials to protect these areas during Assemblaggio 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 Assemblaggio di PCB
- Provides uniform coverage
- Suitable for both low and high volumes
Rivestimento selettivo (automatizzato)
- High precision using programmable machines
- Ideal for Assemblaggio di PCB chiavi in mano linee di produzione
- Riduce i requisiti di mascheratura
Rivestimento per immersione
- PCB is immersed in coating liquid
- Ensures full coverage
- May result in thicker coating
Rivestimento a pennello
- Used for small batches or rework
- Less consistent than automated methods
Controllo dello spessore del rivestimento
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 Assemblaggio SMT.
Processo di polimerizzazione
After application, the coating must be cured:
- Asciugatura ad aria (common for acrylic coatings)
- Polimerizzazione a caldo (for urethane or epoxy)
- Polimerizzazione UV (for UV-curable HumiSeal coatings)
Follow manufacturer specifications for time and temperature to ensure full curing.
Ispezione e controllo qualità
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 Assemblaggio di PCB chiavi in mano.
Le migliori pratiche
- Maintain clean working environment
- Control humidity and temperature during application
- Use proper equipment calibration
- Train operators on coating techniques
Conclusione
Applying HumiSeal conformal coating involves careful surface preparation, proper masking, controlled application, and thorough curing. In Assemblaggio di PCB, Assemblaggio SMT, e Assemblaggio di PCB chiavi in 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.
Richiedete un preventivo per il rivestimento conforme
Garantite l'affidabilità a lungo termine dei vostri PCB con le nostre soluzioni di rivestimento. Iniziate da qui.
Inviateci i vostri requisiti e riceverete una risposta rapida dal nostro team di ingegneri.
✔ Risposta in 24 ore ✔ Supporto ingegneristico ✔ Produzione di piccole dimensioni e di massa
Shenzhen Tengxinjie Electronics Co., Ltd.


