This Dens Glass sheathing gypsum panel helps in improve the performance and durability of a wide range of fire-rated and non-fire-rated building assemblies. It’s made of fiberglass and mat-faced, meaning that it’s built to stay strong and provide superior moisture and mold resistance when compared to paper-faced sheathing. It offers a rigid substrate for a wide variety of air or water-resistive barrier systems, making it perfect for new construction projects and remodeling alike. This product’s dimensions are 4 feet by 8 feet x 1/2 inch, and it is covered by a limited warranty.