... Heat Preservation 4.CE NEW!!! Light Weight Fireproof Sound Insulation Wall Partition BoardBrand: BOYUEJIAComposition: Calcium silicate board(face panel ... construction, additions or renovations.Advantages: Light weight, sound insulation,heat insulation and preservation, water proof, fire proof, fast construction ... strength/N≥1000≥1000≥1000≥1200≥1300≥15009Sound insulation capacity in the air/db≥30≥35≥40 ...