Bentonite - S400/ CE2

Bentonites are deposits of special clay minerals; these clay minerals are usually in the form of calcium-rich minerals. Characteristic of clay minerals is their platelet structure; this structure allows bentonite to swell, enabling it to achieve a high moisture-binding capacity. By activating calcium bentonites with sodium, moisture binding can be trebled. The swelling clay mineral content is also called the smectite content. A good bentonite has a smectite content of at least 80-85%.

The main function of bentonites is to improve the soil's moisture-holding capacity, particularly in very dry sandy soils. Bentonite has a long-term effect, so a soil enriched with bentonite will retain moisture better after every dry period.

Another use of bentonite is the creation of a compacted layer which can be used, for example, to create natural ponds; bentonite prevents water seepage into the subsoil. This requires a specific method of application about which we are happy to advise.

FormPowder and Granulate (natural)
Moisture binding++++
Ion exchanger ++
Soil improver ++++ (sandy soil)
Nutrient supplier+

Poortershaven: Know-how

Poortershaven continuously develops new applications for the use of clay and rock minerals in the agricultural sector. This has resulted in well-known and frequently used products for animal health, soil improvement and animal bedding hygiene.

The colour of the products may differ in real life, due to the sharpness and screen settings. If desired, we would be happy to send a sample.

Broad product portfolio

Poortershaven offers a wide range of products. This means that within a product range you will always find a form that suits the intended use and/or technical installation.

Continuously innovating

We collaborate with universities and research institutes, among others, to test our products and their applications and to generate knowledge about optimal use.

Product knowledge

Through long-term relationships with our suppliers, we supply reliable and stable products. Along with our suppliers, we have a lot of in-house specialist product knowledge.


We know our products and would be happy to get in touch with you. We are happy to share our knowledge about our products with you, enabling us to jointly find an appropriate solution for your problem.


If you have any questions about our range, prices or current stock, if you would like advice, or if you would simply like to touch base with us, please contact us.

We look forward to assisting you.

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For more information and current prices, please feel free to contact one of our employees.

Call +31(0)10 4365755 or mail