R-17.4 Thermafiber® FireSpan® 40 Unfaced Mineral Wool Insulation 4 in. x 36 in. x 60 in. (45 sq. ft.) | SAFB4.0-FS40-3660-TF

These products are non-combustible, moisture-resistant, non-corrosive, non-deteriorating, mildew-resistant and vermin-resistant. Its natural dark color provides shadowing in glass spandrels. FireSpan® 40 & 90 insulations provide thermal insulation, fire containment, enhanced acoustical performance, and vapor control in many different UL and Intertek (formerly OPL) listed fire containment assemblies of 1, 2, and 3-hr ratings.

• Exceptional performance in Perimeter Fire Containment Systems
• Provides fire containment in rated assemblies
• Fire resistant to temperatures above 2,000° F (1,093° C)
• Helps conserve energy, reduces greenhouse gases emissions
• Mold-resistant
• Enhances acoustical performance