Pemko S771D7 Adhesive-backed High Temperature Silicone Meeting Stile Gasket. The S771 astragal/meeting stile seal can be installed on virtually any pair of doors where sound attenuation is required. This products seals the opening to prevent heat loss, slow the passage of smoke and act as a weatherization product. Unaffected by sunlight, ozone and ultraviolet rays and is impervious to fungus and mildew. It has an effective range between -76F and 446F. Dark Brown Color. 7' Roll.