... %,strength 2.7MPa) 2)Fireproofing,dampproof,mildewproof,soundproof, Ceiling Medallion Features: 1) Fireproofing, dampproof ,mildewproof, mothproofing, soundproof, high strength, easy cutting,easy installation ... our gypsum cornice to add style and value for the ceiling and wall of space by concealing the junction / joint ...