This 100% acrylic resin coating forms a flexible layer over any fiberglass roof to protect and beautify. Decor fiberglass RV roof Coating gives roofs a super bright white finish, which resists mildew and algae and reflects the sun's heat to help keep the interior cooler. Always use decor fiberglass clean & prep and allow to dry before applying this coating product. Two coats are required. One gallon of decor fiberglass RV roof Coating will cover 350 sq. Ft. Per coat.