... concrete, grouts, and mortars as well as elastomeric, polymer, refractory, ceramic and rubber applications. (5) HS No.: 28112200 China Origin, ... 2. Main function (1) Microsilica in refractory enhancing the fluid of pouring refractory, reducing the volume of used water, ... strength and thermal shock of refractory. (4) Microsilica in refractory is used in Microsilica in refractory is used in unshaped, ...