Nu-WoolThe new U382 Firewall offers two and a half hours of protection at half the cost of other solutions on the market. It meets all the requirements of ASTM-E-119 and UL 263, with only one layer of Type C gypsum wallboard on each side. Filled with Nu-Wool Premium Cellulose Insulation, the U382 has an STC of 53. With an additional layer of gypsum board on one side the STC is 58. An STC of 63 is achieved with an added layer of gypsum board on each side.
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