What weather conditions are prohibited for the application of prime coat?

The application of a prime coat is sensitive to certain weather conditions to ensure proper adhesion and effectiveness. Foggy, rainy, or sandstorm conditions are prohibited because they can significantly impact the performance of the prime coat.

When it rains, moisture can hinder the bond between the prime coat and the substrate, leading to inadequate adhesion, potential washout, and overall failure of the coating. Similarly, fog can introduce moisture that disrupts the application process. During a sandstorm, particulates and blowing sand can lead to contamination of the surface, compromising the prime coat's ability to bond effectively.

These conditions can introduce moisture and contaminants that affect the curing process, ultimately jeopardizing the integrity of the pavement. Hence, to ensure a successful priming process, it is crucial to avoid applying the prime coat during these adverse weather conditions. Other weather conditions like sunny or windy can sometimes be manageable with proper techniques, but the presence of water or heavy particulates is particularly detrimental.