Gold Bond BRAND SoundBreak XP National Gypsum
187 09 29 00/NGC National Gypsum Company Construction Guide Rev. 07/2017 Gold Bond® BRAND X p ® b oards Gold bond® brand Soundbreak® Xp® Gypsum board consists of two pieces of highdensity, mold, mildew and moistureresistant gypsum board, with a specially designed PURPLE® paper, laminated together with a sounddamping, viscoelastic polymer.