... heat insulation 3. fire, water, sound proof 4. light weight, high strength, no shrinkage 1) Raw materialsgypsum powder, gypsum retaining paper, fiber ... fiber, fiber glass),cornstarch, vesicant, lightweight aggregate, citric acid, water, adhesive, etc.2) Product Description (size and thickness)Normal size: 2440x1220mm ... after receipt of the T/T deposit or L/C. high strength sheetrock