... by SGS before shipment Microsilica , also called silica fume.it is a byproduct of producing silicon metal or ... it has extremely strong surface active.Microsilica can be used in a variety of cementation products, such as concrete, ... elastomeric, polymer, refractory, ceramic and rubber applications. . Specification of Microsilica MININGSUN 95% ParametersStandard ValueSilicon Dioxide(SiO2)96.04 %Loss ...