Apply HumiSeal conformal coating
Applying HumiSeal conformal coating, produced by Chase Corporation, requires controlled processes to ensure proper protection, adhesion, and reliability. In Montering av kretskort, SMT-montering, och Nyckelfärdig PCB-montering, correct application is critical to achieve consistent coating performance.

Surface preparation (most important step)
Före ansökan Konform beläggning, 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 Montering av kretskort.
Masking (protect no-coat areas)
Certain areas must not be coated:
- Kontaktdon och uttag
- Test points
- Switches and contact surfaces
Use tapes, boots, or masking materials to protect these areas during SMT-montering.
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 Montering av kretskort
- Provides uniform coverage
- Suitable for both low and high volumes
Selektiv beläggning (automatiserad)
- High precision using programmable machines
- Ideal for Nyckelfärdig PCB-montering produktionslinjer
- Minskar kraven på maskering
Doppbeläggning
- PCB is immersed in coating liquid
- Ensures full coverage
- May result in thicker coating
Beläggning med pensel
- Used for small batches or rework
- Less consistent than automated methods
Kontrollera beläggningens tjocklek
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 SMT-montering.
Härdningsprocess
After application, the coating must be cured:
- Lufttorkning (common for acrylic coatings)
- Härdning med värme (for urethane or epoxy)
- UV-härdning (for UV-curable HumiSeal coatings)
Follow manufacturer specifications for time and temperature to ensure full curing.
Inspektion och kvalitetskontroll
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 Nyckelfärdig PCB-montering.
Bästa praxis
- Maintain clean working environment
- Control humidity and temperature during application
- Use proper equipment calibration
- Train operators on coating techniques
Slutsats
Applying HumiSeal conformal coating involves careful surface preparation, proper masking, controlled application, and thorough curing. In Montering av kretskort, SMT-montering, och Nyckelfärdig PCB-montering, 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.
Få en offert på Conformal Coating
Säkerställ långsiktig tillförlitlighet för dina kretskort med våra beläggningslösningar. Börja här.
Skicka oss dina krav och få ett snabbt svar från vårt ingenjörsteam.
✔ Svar 24 timmar om dygnet ✔ Teknisk support ✔ Små- och massproduktion
Shenzhen Tengxinjie Electronics Co, Ltd.


