First of all, organic bentonite and fumed silica have similar properties.

Their thickening and thixotropy are similar, but the difference is great. In waterproof coatings, meteorological silica has poor UV resistance and its yellowing index is much larger than that of organic bentonite. In the application fields of some silicone sealants, meteorological silica will be too strong in low-temperature thickening, reaching >6MPa, while the bentonite solution is less than 2.8Mpa.At the same time, the thixotropic index of organic bentonite is much higher than that of meteorological silica, which is generally between 4.2 and 5.0.

Organic bentonite vs fumed silica

Organophilic Bentonite Clay for Eco Friendly Fluids
Rheology Modifier for Solvent Coatings
Rheological Additive Organoclay for Industrial Coatings

Organoclay Applications

Organic bentonite vs fumed silica

glass beads for blasting
Organoclay for greases
glass microspheres

Organic bentonite vs fumed silica