3.08 POLYURETHANE FINISH TOP COAT APPLICATIONA. Keep area clean and dry and apply top resin layer within 7 days. If window is exceeded clean with non-sudsing detergent and clean water rinse, and allow to dry prior to application of Reactivation Primer.B. Apply Sikalastic 641 Lo-VOC per RoofPro System Guide at the coverage rate 69sf/gal to achieve the required thickness of the RoofPro 25 System Guide with a 1/2 inch nap phenolic resin core roller.