Sodium bentonite powder for waterproofing and excavation works

Code: PRS.0013

Components: 1

Appearance: Powder

CLAYGRAIN is a dissolved, anhydrous sodium bentonite powder, characterised by a montmorillonite content in excess of 95%, with low yield-point (proof). The product should be used as it is, to increase the amount of bentonite in punctual areas, or mixed with cement and water or just water to obtain a slightly expansive waterproofing mortar, suitable for smoothing any crawl spaces in the concrete prior to laying and refilling the CLAYTEX bentonite sheet.

Linee di appartenenza

General characteristics


Hydroexpansive product: _




Shelf-life: 12 months


Temperature of use: +5 / +35 °C



Technical specifications

Apparent density

0.9-1.00 g/cm³

Liquid limit

>550 %

Loss of liquid to the filter press

<18 ml

Maximum humidity

<13 %

Permeability to 25 kPa of confinement

5.E-09 cm/s

Swelling rate


Available colours

- Beige

Packaging and dimensions

- Bag 25 kg


Product to buy as needed.

Use fields

Reinforcing and/or filling injections. Plastic diaphragms. Punctual protective sealing of critical areas in waterproofing underground areas with bentonite systems.

Use method

The standard dosage is 60 l/m³ of water (standard minimum quantity). The indicated concentration can be adjusted, depending on the characteristics of the soil and the required viscosity. It is necessary to mix the product adequately during the preparation of the slurry to allow sufficient hydration.

Application methods

- To be added to other components

- Brick trowel

- Finishing trowel

- Spatula

Permitted supports

- Concrete

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