Chalking
What it means
Chalking is the formation of a powdery surface residue as a coating weathers or degrades. Exposure, binder durability and coating age are relevant factors.
What to check
- Surface preparation and cleanliness
- Compatibility of previous and new coating
- Application method and film build
- Drying/curing conditions
- Manufacturer instructions and technical data
For a product-specific diagnosis, identify the exact product and surface and consult the current manufacturer guidance.