... follows: 1 Nonpoisonous,no taste, pollution-free,green and environmental protection;2 Good fireproofing characteristic,nonflammable material A grade, its fire ... more than 3 hours;3 Good waterproofing characteristic;4 No hygroscopic,no deformation,good tenacity.5 Heat insulation,sound insulation,the ... efficiency and low down the construction cost. African round house fgc materials (all made of FGC)