Blistering
What it means
Blisters are raised areas in a coating film. Investigation should consider moisture, trapped material, substrate condition, heat and application conditions.
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.