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.