Manufactured at the source, with a stable global supply

Yes. In most industrial markets, silica fume and microsilica are two names for the same ultrafine, predominantly amorphous silica collected during silicon or ferrosilicon production. They should not be confused with ground crystalline silica flour, which is a different material.

Silica fume provides ultrafine particle filling and, in cementitious systems, pozzolanic reactivity. Depending on the formulation, it can improve particle packing, cohesion, strength, impermeability and durability. In refractory castables, grade selection also considers flow, water demand and high-temperature performance.

Start with the application and required standard, then compare SiO₂, loss on ignition, moisture, retained material on the specified sieve, water demand, bulk density and form. A laboratory trial is recommended because the best grade depends on the complete formulation and process.

Densified silica fume has a higher bulk density for more efficient transport and handling. Undensified silica fume has a lower bulk density and may disperse more readily in some systems. The right form depends on dosing equipment, mixing energy, packaging and application requirements.

Samples and available technical or batch documents can be requested for grade evaluation. Tell us the application, target specification, test method and required quantity so we can confirm the appropriate sample and documentation.