Features of sodium water glass

More and more often today liquid glass is in demand among buyers. At the same time, a large part of them prefer the sodium variety. This choice is explained by its features and technical characteristics. What is it, what is the scope of its application, what the physical and mechanical properties of this material say – let’s figure it out.


Liquid soda glass is nothing more than a silicate glue based on sodium silicate with a caustic soda content. In liquid form, it is characterized by a viscous structure and transparency. It is a waterproofing material with penetrating ability. It is due to the presence of sodium silicate that its high performance is due..

Sodium liquid glass is a proven remedy that has not lost its relevance for a long time.. It is in demand in many areas of industry, including automotive, metallurgy and construction. In addition, it is used in private construction. Externally, the liquid mass has no visible mechanical impurities.

This glass hardens slowly, and only in air. The liquid mass loses its stability, becomes a gel that hardens over time and gains high strength.

Thus, its astringent qualities are manifested. However, the degree of penetration of air carbon dioxide is small, and its positive properties are visible mainly on the surface..


This material is obtained by autoclaving sodium silicate melt. In the melt, a composition of quartz sand with soda (sodium sulfate) and potash is used, performing this process in special furnaces at a tremendous temperature (about 1400 degrees). As soon as the melt is formed, it is immediately cooled, and it breaks up into pieces of a greenish-mint hue, which are called lump silicate..

Liquid glass is created from lumps by dissolving in water or by autoclaving. The autoclave method uses saturated steam. The method in which it is dissolved in water involves the hydrolysis of sodium silicate. This forms a colloidal solution of silicic acid, as well as alkaline hydroxides.

Properties, advantages and disadvantages

Liquid soda glass refers to mono-alkaline products, outwardly it is somewhat reminiscent of a rubber viscous mass. This material is characterized by water-repellent properties: it does not allow water to pass through. It is a good antiseptic as it protects the substrate from the appearance and spread of fungus. In addition, the material is antistatic: it increases the inertness of the bases to electrostatic discharges..

Due to the hardening qualities, liquid glass increases the strength and wear resistance of the treated surfaces. This is a refractory material, the use of which increases the fire resistance of the base and its protection against acidic components. The mass quickly fills small gaps and even pores, it protects concrete and wood substrates. At the same time, it is distinguished by the economy of consumption.

The use of liquid sodium glass makes it possible to obtain a thin film with a long service life. It can be used in different types of rooms, including those with a high degree of humidity. However, this material also has disadvantages. For example, it cannot be used as a waterproofing on brick foundations..

The formed glass film does not always have the required strength.. Therefore, additional waterproofing methods have to be applied. It is not difficult for a master to work with liquid sodium glass, but a beginner should take into account the fact that it is undesirable to delay in work. In addition, it must be borne in mind that the composition is unable to waterproof the base if it is not previously prepared for this..

You will have to not only clean the surface of dust and debris, but also strengthen it with a deep penetration primer. These are additional expenses, but without a soil solution, the necessary strengthening and high adhesion of the film and the base will not work..

It is imperative to follow the technology. It should be borne in mind that the mass is distributed evenly over the entire area of ​​the working area..


Liquid soda glass is produced in accordance with GOST 13078 81.

The physical and mechanical standards for liquid sodium glass are as follows:

  • the density is 1.30 – 1.45 g / cm3;
  • the mass fraction of sodium oxide varies in the range of 8.7 – 12.2%;
  • the mass fraction of silicon dioxide does not exceed 24.3 – 31.9%;

  • the mass fraction of iron oxide and aluminum oxide is not more than 0.25%;
  • the mass fraction of sulfuric anhydride is 0.15%;
  • the silicate modulus is normally 2.6 – 3.0;
  • the guaranteed shelf life is 12 months.

The waterproofing material, which has a certificate of compliance with the standards, is poured into the buyer’s container. In this case, as a rule, it should be made of a material that is inert to contact with silicate glue. Factory packages differ in volume, which makes it possible for the buyer to purchase exactly the amount of raw materials that he needs at the moment. This product is produced by different manufacturers today..

Among them are the following brands:

  • KubanZheldormash;
  • TD “Stekloprodukt”;
  • LLC Metterra;

  • LLC “Oxium”;
  • JSC “Contact”;
  • JSC “Ivkhimprom”;
  • NPO “Silicate”.

Common properties of sodium and potassium water glass are water solubility. In addition, both types, when dried in the open air, form a thin film on the treated substrate. At the same time, the two types of glass also have differences. For example, the modulus of potassium glass is better and higher (3.5-4.5), but the cost is lower for sodium material..

Scope of application

Liquid soda glass is characterized by a wide range of uses.

Today it is used in the construction industry:

  • As a waterproofing material for basements, attics and foundations. Liquid glass protects floors from high humidity, UV radiation, and fire.
  • For waterproofing objects such as wells, pools, wells. The processing of internal surfaces allows you to protect them not only from deformation, but also from destruction.
  • As part of paints, this increases their inertness to the effects of high temperature and humidity..
  • As an antiseptic used to treat concrete and wood.

The use of liquid glass is extensive. Putty is made from it, used when a protective solution is needed to seal joints in sewer and pipeline systems. It is also appropriate when laying stoves or fireplaces. It is used not only in its pure form, but also as an additional component in the preparation of mixtures or other impregnations..

The properties of liquid glass make it possible to use it in everyday life.. For example, it is a suitable material that is appropriate for the installation of cladding (for example, plastic panels, linoleum, PVC tiles). It can even make fabrics refractory, not to mention the fact that it can become a sealant for metal pipes. In addition, liquid glass is successfully used to treat damaged trees..

It is a true companion for a screed composition with a 3D effect. It is relevant when you need to clean kitchen utensils, restore a car body, use a variety of decor or restore surfaces made of wood, plastic or porcelain..

The material is universal, due to which it is possible to prepare a primer, waterproofing, fire-resistant and antiseptic solution from it. In addition, a reliable impregnation is obtained from liquid caustic glass..

How to use?

Instructions for using liquid sodium glass are quite simple. First, everything that flakes off the surface is removed, including old paint. If there are greasy or oil stains on the base, they are also removed, after which dust must be removed, since it prevents any material from fixing to the base. It will simply roll off the surface..

After preliminary cleaning of the base, it is treated with soil, applying it in a uniform layer using a construction roller, and at the joints with a flat brush. After the first coat of primer has dried, another coat can be applied. The application must be uniform. When the second layer dries up, prepare a layer of waterproofing, then spread it over the working base with a thin layer using a spatula.

For more information on the use of sodium liquid glass for a car, see below..

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