... its excellent characteristics are as follows: 1. Nonpoisonous,no taste, pollution-free,green and environmental protection2. Good ... than 3 hours. 3. Good waterproofing characteristic.4. No hygroscopic,no deformation,good tenacity.5. Heat insulation,sound insulation, ... it is the ideal replacement material of wood board,gypsum board and calcium silicate board.1.Fire-proof,water-proof,aging-proof, ...