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Radar™ High-NRC High-CAC Firecode® acoustical panels are an economical, all-purpose ceiling pattern available in various panel sizes and offering balanced acoustics with a 40 CAC for increased room-to-room speech privacy and a 0.70 NRC for greater sound control in open-plan areas. They are a Firecode® product designed to meet life-safety codes. This product utilizes a ground wet-felted basemat consisting of perlite, mineral wool, paper fiber and starch with varying levels of clay. Additional information regarding Radar™ products can be found at usg.com. These products generally fall under ASTM E1264 Section 5.2 designation as Type III—Mineral base with painted finish. The modifications typically involve modifications to the thickness, density, basemat composition and/or coating package. These products generally fall under ASTM E1264 Section 5.2 designation as Type III—Mineral base with painted finish. The modifications typically involve modifications to the thickness, density, basemat composition and/or coating package. This EPD covers the following 3/4in Radar™ High-NRC High-CAC Firecode® acoustical panels: item numbers: 22521, 22541, 22523, and 22527.