Once cured, E las tek coatings form a tough, weather resistant barrier that is highly resistant to water. If moisture from rain, condensation, or any source reaches the new coating before water within the coating has evaporated, adhesion to the roof surface can be affected. Water still in the coating provides a pathway for surface moisture to penetrate the coating and break the new coating's adhesion with the roof. Problems also occur when a damp roof surface , caused by dew, standing water, or cleaning, is coated trapping moisture below the coating surface. Damaged coating often appears wrinkled, loose, and lifeless.
Coatings can fail from moisture above or below if present before curing is largely complete.
E las tek formulated some coatings differently in winter to enable them to dry more quickly and to be less water sensitive. Coatings will dry without problems if applied in suitable weather, if ponding areas are avoided, and adequate drying time allowed. Drying Time increases as temperatures fall and humidity rises. Direct sun is very helpful in drying. Overcast skies dramatically slow drying.