Sodium Disilicate

Our sodium disilicate is hydrated and completely soluble in water. It is produced in a state-of-the art granulation plant allowing a careful control of the composition (ratio, hydration, particle size) which ensures a stable product quality ! Our sodium disilicate is a versatile product that shows excellent buffering capacity, effective corrosion inhibition, good bleach stabilizing- and binding properties. The product is made from sand and soda and recognized as environmentally safe. Our sodium disilicate is particularly suitable for use in dry-mix products and where less water is desired.

Our hydrated sodium disilicate contains both silica and alkalinity in a molar ratio of 2:1 between silica and sodium oxide. In addition, as it is hydrated it contains 18% of water which improves it's solubility. Our powder range has been specifically developed to meet the demand for different rates of solution and reactivity.

Properties and Advantages

  • White and free-flowing granules and powders
  • High bulk density
  • Excellent buffering capacity
  • Good bleach stabilizing properties
  • Effective corrosion inhibition
  • Outstanding binding properties to metals, ceramics, glasses and fibers
  • High temperature resistance (up to 1600°C)
  • Non-toxic and non-flammable

Product Overview

Our sodium disilicate is available in a fine granular form  (200 - 630 micron) and a variety of powder forms: 200P0 (70 micron), 200P1 (100 micron) and 200P2 (170 micron). The complete product specification and material safety datasheet can be found under downloads. The typical values below are given for informational purposes only.

Typical values

FormulaNa2O.2SiO2
Cas nr.1344-09-8
Molar ratio2,0
%SiO254,5
%Na2O27,5
% Dry matter82,0
Bulkdensity (g/L)800

The product is available in big bags and 25 kg bags. Our bags ensure that the product is delivered in a fresh and free-flowing state.

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     Sodium Disilicate

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    About Silmaco.

    Silmaco is a family business with more than 30 years of experience in the production of high-quality and customized silicates. Our flexibility, focus on innovation and quality guarantees your company a carefree service and the most appropriate silicate for your application.

    40 people

    100 000 T/y of Sodium Silicates

    Selling over 5 continents and in 60 countries