DEXcell FA™ Glass Mat Roof Board has heavy duty coated fiberglass facers and an enhanced mold- and moisture-resistant gypsum core. The precoated facers sealed surface technology is designed to increase the coverage of membrane adhesives and enhance the performance of the bond strength of the system. The DEXcell FA Glass Mat Roof Boards help reduce the amount of adhesive used and may eliminate the need for a field primer. Consult the system manufacturer for actual priming requirements. This mold- and moisture-resistant gypsum panel is a substrate board, thermal barrier and/or cover board for commercial roofing applications. It scores and cuts easily, and it is specially coated on the front, back and sides for easily handling.