A recent article in the February 2014 issue of Journal of Protective Coatings & Lines had several great tips regarding application of coatings and mil thickness recommendation. The article was titiled “Applying Coatings outside of the Recommend Thickness Range” . More information can be found in the full article.
This article dealt with both Wet Film Thickness (WFT) during application and Dry Film Thickness (DFT) after the coating has cured.
Insufficient Coating Thickness can lead to poor hiding, pinpoint corrosion, and cracked or brittle coatings
Excessive Coating Thickness can lead to sagging or running, cracking or de-lamination, wrinkling, increased dry time and improper curing.