What can be a consequence of coating applied too thickly?

When a coating is applied too thickly, one of the primary consequences is the occurrence of surface runs and sags. This phenomenon happens because the excess material cannot settle uniformly and may pool or flow due to gravity, leading to visibly uneven surfaces. Additionally, thick coats can interfere with the proper bonding and drying processes of the coating. This can compromise the overall performance and appearance of the coated surface, making runs and sags a significant concern for coating application.

In contrast, increased adhesion, lesser curing time, and enhanced product lifetime are not outcomes of overly thick coatings. High adhesion typically results from proper application thickness, while an excessively thick layer can lead to problems with proper curing, as thicker coats can trap solvents and slow down the drying process. Similarly, while coatings should ideally enhance the product's lifetime when applied correctly, applying them too thickly can actually result in a reduced lifespan due to issues like common defects and inconsistent wear over time.