DensGlass® Sheathing It is a preferred substrate under brick, stone, stucco, siding and EIFS due to its ability to protect a structure against incidental moisture during and after construction. DensGlass Sheathing adds performance and durability to a wide range of fire-rated and non-fire-rated building assemblies.Click to see full answer. Herein, does DensGlass have a fire rating?5/89 (15.9 mm) DensGlass® Fireguard® Sheathing is UL and ULC classified Type DGG. DensGlass Sheathing is manufactured to meet ASTM C1177. Flame spread and smoke develop rating of 0/0 when tested in accordance with ASTM E84 or CAN/ULC S102.Secondly, what is DensGlass? DensGlass® is a gypsum panel with fiberglass mat facings and its widely recognized GOLD colored primer coating for superior mold and moisture resistance. For use as exterior substrate panel for walls, ceilings and soffits. Ideal for EIFS, brick and other exterior cladding applications. Keeping this in view, is DensGlass fireproof? Fire Resistance DensGlass Sheathing is noncombustible as described and tested in accordance with ASTM E136 or CAN/ULC S114.What is the R value of DensGlass?R-Value (ASTM C518): 0.56. 12. Mold Resistance (ASTM D3273): 10, in a test as manufactured.