1. natural material 2. sound and heat insulation 3. fire, water, sound proof 4. light weight, high strength, no shrinkage 1) Raw materialsgypsum ... ) Fuction, Advantage and UseSound insulation, heat insulation, moistureproof, fireproofs, water-resiatance, non-desulfuration, environmental protection, pure nature, non-radioactive; be ... after receipt of the T/T deposit or L/C. fire proof plaster board