PLAS-T-COTEÂ® FIBERED TRAILER TOP COATING - Coating for metal and fiberglass roofs (not suitable for rubber roofs or homes with asphalt roofing.) Plas-T-Coat is a non-asphalt, high quality chemically engineered roof coating that contains long fibers, pigments and non-drying resins. It is a thick, white fibered or aluminum fibered colored coating with an amazing ability to conform to, and protect against all weather conditions. It has excellent acoustical and insulating qualities. Plas-T-Coat alkyd stays flexible, contracts and expands with roof seams. Covers 40 sq. ft. per gallon. Aluminum, 1-Gallont Can.