Why is it important to monitor the dew point during coating applications?

Monitoring the dew point during coating applications is crucial primarily to prevent moisture-related defects. The dew point is the temperature at which air becomes saturated with moisture, leading to condensation. If the temperature of the substrate or the ambient environment falls below this dew point during the application of coatings, moisture can condense on surfaces, resulting in problems such as blistering, poor adhesion, and the formation of other defects that compromise the integrity and performance of the coating.

In the context of this task, ensuring that the substrate remains dry and free of moisture is essential for achieving optimal adhesion and the desired finish. Maintaining awareness of the dew point allows inspectors and applicators to make informed decisions about when to proceed with coating applications, ensuring that environmental conditions are suitable for a successful outcome.