Red Seal Automotive Refinishing Technician Practice Exam

Which of these factors can result in adhesion failure in paint?

1. High humidity during application

2. Proper surface preparation

3. Use of high-quality paint

4. Application under optimal temperature

The correct answer is: High humidity during application

High humidity during paint application can indeed lead to adhesion failure. When humidity levels are elevated, moisture in the air can interfere with the bonding process between the paint and the surface it is applied to. The moisture may not allow the paint to adhere properly, resulting in issues such as peeling, bubbling, or delamination once the paint dries. On the other hand, proper surface preparation ensures that the paint has a clean and suitable substrate to bond to, which enhances adhesion. Using high-quality paint typically improves performance characteristics, including adhesion, while applying under optimal temperature conditions further supports ideal drying and curing processes, enhancing the paint's ability to stick to the surface.