What is classified as a functional defect in paint?

A functional defect in paint refers to issues that compromise the paint's ability to perform its intended role, such as protecting surfaces or providing a durable finish. This encompasses problems that can affect adhesion, corrosion resistance, or overall durability of the paint application. When paint performance is negatively impacted—whether through peeling, cracking, or inadequate covering—this can lead to premature failure of the coating, which is critical in a protective context.

In contrast, cosmetic issues or minor discolorations may not affect the operational capabilities of the paint and can often be overlooked or considered aesthetic rather than functional defects. Therefore, identifying features that detrimentally alter the paint's performance is crucial for maintaining the integrity and effectiveness of painted surfaces.