USG Securock® Brand Cement Roof Board is a high-performance roof board for use in low-slope roofi ng systems. As the lightest and easiest-to-use cement board in the industry, it enhances the entire roofi ng system as both a cover board and as a parapet, fir e or thermal barrier roof board. As a cover board, USG Securock Cement Roof Board can be used with a variety of membranes and systems including most adhered and mechanically attached systems, but it is ideal for applications such as liquid-applied membranes and cold mastic-modifi ed bitumen. As a parapet, fi re or thermal barrier roof board, USG Securock Cement Roof Board has an unlimited slope classification and is noncombustible. Because this product is cement-based, it provides superior compressive strength, water durability and mold resistance.