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Bentonite can be added up to 20% by volume by weight of cement. Above 6%, the addition of a dispersant is usually necessary to reduce the slurry viscosity and gel strength.

As shown in the table below, the slurry density decreases and the yield increases quickly with bentonite concentrations. High bentonite concentrations tend to improve fluid loss control; however the compromise is higher cement permeability and lower compressive strength. Naturalgel can also be used as an extender at elevated temperatures.

The extending properties of bentonite can be greatly enhanced if the material is allowed to completely hydrate in the mix water prior to slurry mixing. The presence of high concentrations of calcium ion in the aqueous phase of cement slurry inhibits the hydration of Naturalgel.

Appearance: Light tan-grey powder or granules

Specific Gravity: 2.45 - 2.55

Melting Point: 1450°C

Bulk Density: 49 - 55 lbs/ft³

Solubility: 100% soluble in water

pH: 8.0 - 10.0 (5% aq. solution)

WHMIS: Controlled (see MSDS)

TDG: Not regulated

Packaging: 50kg bag