Sodium Silicate

European alchemists first noticed soluble silicates of alkali metals (sodium or potassium) in the 1500s. Since then, these substances have played a vital role in various places. A common category of these chemicals is sodium silicate, the generic name for chemical compounds with unique formulas and multiple properties that lead to various utilities. There are many applications for the product, notably cement block manufacturing, fire suppression, textile and wood processing, as well as the manufacture of refractory ceramics, adhesives, and silica gels.

As a result, many industries must rely on superior grades of sodium silicate to produce stable products that meet market standards. JAM Group Co is one of the prominent manufacturers of sodium silicate in several qualities for industrial usage; every company worldwide can count on the  JAM Group’s sodium silicate as a premium product with highly robust properties. It is helpful to know that JAM Group’s factories located in eastern Europe and the Middle East have enabled this sodium silicate manufacturer to present a product with international standards.

What is sodium silicate ?

The term “sodium silicate” refers to a group of chemical substances containing the formula Na2xSiyO2y+x or (Na2O)x·(SiO2)y, including sodium orthosilicate (Na4SiO4) and sodium pyrosilicate (Na6Si2O7). Anions are often polymeric. These substances often come in the form of white powders or colorless translucent solids that are soluble in varying degrees of water.

A combination of these substances, primarily the metasilicate, often known as water glass, water glass, or liquid glass, is also referred to both technically and colloquially as sodium silicate. The solution can be used in a wide range of applications, such as the creation of types of cement, passive fire protection, the processing of textiles and wood, and the fabrication of refractory ceramics, adhesives, and silica gel. The commercial product, which is available as a water solution or solid, is usually green or blue due to impurities containing iron.

Melting point 1089 °C

Molecular Weight: 122.063 g/mol


Chemical safety

Sodium silicate Ratio

Sodium silicate glass composition can be designated as: Na2 O • (SiO2)x – where x is the ratio of the components and falls in the practical range from 0.4 to 4.0.

Different grades of the product

The majority of laboratory chemicals are labeled with a quality, which typically indicates the chemical’s purity. Although there are numerous standards used in grading, you are most likely to come across the ACS, Reagent Grade, and Laboratory Grades. Various chemical producers may employ different terms; however, as a general guideline, ACS and Reagent Grades are typically the purest, whereas Laboratory Grade is less pure. Chemicals that are ACS Grade are typically more expensive than chemicals that are lower grades because they are accompanied by a batch-specific Certificate of Analysis. As a middle-tier quality, laboratory-grade chemicals are frequently utilized in less thorough studies and educational labs.

As mentioned before, sodium silicate is a general name used to refer to a variety of chemical substances with different purities and chemical and mechanical properties. Each of these products can be introduced as different grades of sodium silicate. They may be differed based on variables below:

  • Specific gravity;
  • Na2O content;
  • SiO2 content;
  • Modulus (SiO2:Na2O);
  • Total solids content.

In the industrial world, the weight ratio of SiO2 to Na2O distinguishes the different classes of sodium silicate. The ratio range is 1:2 to 3.75:1. Alkaline grades are those whose ratios are less than 2.85:1. They are referred to as neutral if their SiO2:Na2O ratio is higher.

Sodium silicate production process

Sodium silicate has been manufactured since the 19th century, and the basic principles of making “silicate of soda” have not changed since that time. It is commonly produced by roasting various quantities of soda ash (sodium carbonate, Na2CO3) and silica sand

(a ubiquitous source of SiO2) in a furnace at temperatures between about 1,000 and 1,400 °C (approximately 1,800 and 2,500 °F), a process that gives off carbon dioxide (CO2) and produces sodium silicate (Na2SiO3; usually represented by its two constituents, Na2O and SiO2):

                                            Na2CO3 + SiO2→ Na2O∙SiO2 + CO2

This roasting produces fused glassy lumps called cullet, which can be cooled and sold in that form or ground up and sold as powders. Lump or ground water glass in turn can be fed into pressurized reactors for dissolving in hot water. The solution is cooled to a viscous liquid and sold in containers ranging in size from small jars to large drums or tanks


Sodium silicate liquid can also be prepared directly by dissolving silica sand under pressure in a heated aqueous solution of caustic soda (sodium hydroxide, NaOH):

                                                2NaOH + SiO2 → Na2O∙SiO2 + H2O

In either production route, the higher the ratio of SiO2 to Na2O and the higher the concentration of both ingredients, the more viscous the solution. Viscosity is a product of the formation of silicate polymers, the silicon (Si) and oxygen (O) atoms being linked by covalent bonds into large negatively charged chain or ring structures that incorporate the positively charged sodium ions as well as water molecules. Highly viscous solutions can be spray-dried to form glasslike beads of hydrated sodium silicate. The beads can be packaged for sale to commercial users much like ground cullet, but they dissolve more readily than the anhydrous form of water glass.

Sodium silicate applications

Applying sodium siiste (SS) in practice allows for the more effective and efficient performance of a variety of good routine operations. All of this is made feasible by silicate colloid precipitation and polymerization. Silicate is a unique substance since it is water soluble, non-flammable, non-explosive, inorganic, non-toxic, economical, and environmentally benign. For example, adding SS to the drilling fluid allows problematic shales to be drilled more effectively than conventional oil-based muds (OBM), and lost circulation can be easily fixed using SS-based techniques. Below, you can discover the applications of sodium silicate more thoroughly.

Deflocculating silicates help break up inorganic or particulate soils into fine particles, making them easier to remove from surfaces and easier to suspend in solutions.


The most common application of sodium silicate solutions is in producing cardboard which is used as a paper cement

Drilling fluids

Sodium silicate is frequently used in drilling fluids for stabilizing borehole walls and avoiding the collapse of bore walls. It is particularly functional when drill holes pass through argillaceous formations containing swelling clay minerals such as smectite or montmorillonite.

Concrete and general masonry treatment

The use of sodium silicate solution in Concrete treatening could help to decrease porosity in most masonry products including concrete, stucco, and plasters. The consequence is in reducing water penetration, but has no known effect on reducing water vapor transmission and emission. A chemical reaction occurs with the excess Ca(OH)2 (portlandite) present in the concrete that permanently binds the silicates with the surface, making them much more durable and water repellent. This treatment commonly is used only when  the initial cure has occurred (7 days or more depending on conditions). These coatings are known as silicate mineral paint.

Detergent auxiliaries

Sodium silicate is also used in detergent auxiliaries such as complex sodium disilicate and modified sodium disilicate. The detergent granules gain their ruggedness from a coating of silicates.

Water treatment

Sodium silicate is employed as an alum coagulant and an iron flocculants in wastewater treatment plants. Using Sodium silicate cause colloidal molecules blinds and leads to create  aggregates that sink to the bottom of the water column. The microscopic negatively charged particles suspended in water interact with sodium a result of increasing of ionic strength caused by the addition of sodium silicate  Their electrical double layer collapses and they subsequently aggregate. This process is called coagulation.

Refractory use

When Water glass is blended   with the aforementioned lightweight aggregates becomes a useful binder of solids, such as vermiculite and perlite., water glass can be used to make hard, high-temperature insulation boards employed for refractories, passive fire protection and high temperature insulations, such as moulded pipe insulation applications. When mixed with finely divided mineral powders, such as vermiculite dust (which is common scrap from the exfoliation process), it can produce high temperature adhesives   When mixed with finely divided mineral powders, such as vermiculite dust (which is common scrap from the exfoliation process The intumescence disappears in the presence of finely divided mineral dust, whereby the waterglass becomes a mere matrix. Waterglass is inexpensive and copiously available, which makes its use favored in many refractory applications.

Sand casting

It is utilized  as a sand binder in the process of  sand casting of iron or steel. It concede the rapid production of a strong mold, by passing CO2 through the mixture of sand and sodium silicate in the mold box, which hardens it almost immediately

Dye auxiliary in hand dyeing with reactive dyes that needs a high PH to react with textile fiber, sodium silicate is used as a fixative Using. Firstly, the dye is applied to a cellulose-based fabric, including cotton or rayon, or onto silk, secondly it is let to dry, after which the sodium silicate is painted on to the dyed fabric, covered with plastic to retain moisture, and left to react for an hour at room temperature. in hand dyeing that needs a high PH to react with textile fiber, sodium silicate is used as a fixative.

Metal repair

Sodium silicate accompanying silicate, is used in muffler repair and fitting paste. dissolving in water, make both sodium silicate and magnesium to become as a form of a thick paste that is easy to apply. When the exhaust system of an internal combustion engine heats up to its operating temperature, the heat ejects all of the excess water from the paste.

The silicate compounds which  are left over have glass-like properties, making a temporary, brittle repair.

Automotive repair

Sodium silicate another use is as an exhaust system joint and crack sealer for repairing mufflers, resonators, tailpipes, and other exhaust components, with and without fiberglass reinforcing tapes. In this application, , to make the sodium silicate “glued” joint opaque, the sodium silicate (60–70%) is generally mixed with kaolin (40-30%), an aluminum silicate mineral. The sodium silicate is the high-temperature adhesive; the kaolin serves simply as a compatible hightemperature coloring agent., though Some of these repair compounds also have glass fibers to enhance their gap-filling abilities and reduce brittleness.

Sodium silicate can be used to fill gaps within the head gasket. typically used on aluminum alloy cylinder heads, which are sensitive to thermally induced surface deflection. This can be caused by many things including head-bolt stretching, deficient coolant delivery, high cylinder head pressure, overheating, etc.

“Liquid glass” (sodium silicate) is added to the system through the radiator, and allowed to circulate. Sodium silicate is suspended in the coolant until it reaches the cylinder head. At 100– 105°C (212-221°F), sodium silicate loses water molecules to form a glass seal with a remelt temperature above 810°C (1,490°F).

A sodium silicate which is a temporary form of repairment can last two years or longer. The repair occurs rapidly, and symptoms disappear instantly. This repair works only when the sodium silicate reaches its “conversion” temperature at 100–105°C. Contamination of engine oil is a serious possibility in situations in which a coolant-to-oil leak is present. Sodium silicate (glass particulate) contamination of lubricants is detrimental to their function.

Sodium silicate solution is used to inexpensively, quickly, and permanently disable automobile engines. Running an engine with about 2 liters of a sodium silicate solution instead of motor oil causes the solution to precipitate, catastrophically damaging the engine’s bearings and pistons within a few minutes. In the United States, this procedure was used to comply with requirements of the Car Allowance Rebate System (CARS) program.

Safe construction

A mixture of sodium silicate and sawdust has been used in between the double skin of certain safes. This not only makes them more fire resistant, but also makes cutting them open with an oxyacetylene torch extremely difficult due to the smoke emitted.

Crystal gardens

When crystals of a number of metallic salts are dropped into a solution of water glass, simple or branching stalagmites of colored metal silicates are formed. This phenomenon has been used by manufacturers of toys and chemistry sets to provide instructive enjoyment to many generations of children from the early 20th century until now.


Sodium silicate is used as a deflocculate in casting slips helping reduce viscosity and the need for large amounts of water to liquidize the clay body. It is also used to create a crackle effect in pottery, usually wheel-thrown. A vase or bottle is thrown on the wheel, fairly narrow and with thick walls. Sodium silicate is brushed on a section of the piece. After 5 minutes, the wall of the piece is stretched outward with a rib or hand. The result is a wrinkled or cracked look.It is also the main agent in “magic water”, which is used when joining clay pieces, especially if the moisture level of the two differs.

Sealing of leaking water-containing structures

Sodium silicate with additives was injected into the ground to harden it and thereby to prevent further leakage of highly radioactive water from the  nuclear power plant .

Food and medicine

While not actually a medical use, sodium silicate, and other silicates, are the primary components in “instant” wrinkle remover creams, which temporarily tighten the skin to minimize the appearance of wrinkles & under-eye bags. These creams, when applied as a thin film and allowed to dry for a few minutes, can present dramatic results. Unfortunately, it is not permanent, lasts few minutes or couple of hours. It works like water cement, once the muscle starts to move, it cracks and leaves white residues on the skin.

Food preservation

Waterglass has been used as an egg preservative with large success, primarily when refrigeration is not available. Fresh-laid eggs are immersed in a solution of sodium silicate. After being immersed in the solution they were removed and allowed to dry. A permanent air tight coating remains on the eggs. If they are then stored in appropriate environment, the majority of bacteria which would otherwise cause them to spoil are kept out and their moisture is kept in. According to the cited source, treated eggs can be kept fresh using this method for up to five months. When boiling eggs so preserved, the shell is no longer permeable to air, and the egg will tend to crack unless a hole in the shell is made (e.g. with a pin) in order to allow steam to escape.


Sodium silicate gel is also used as a substrate for algal growth in aquaculture hatcheries.

About JAM Group’s Sodium Silicate

In the previous section, various functions of sodium silicate were discussed. This multipurpose chemical compound is applied in diverse industries due to its properties. Every company must collaborate with a reliable sodium silicate manufacturer to obtain various grades of the product. JAM Group Co is a leading sodium silicate exporter that counts on its equipped factories and skilled chemists and provides you with multiple grades of this chemical compound. All outcomes of these factories are high-quality materials suitable for industrial applications in accordance with international standards.

With JAM Group Co., you have a variety of options when it comes to conducting business. This company offers you various choices for selecting the right product and logistics as a reputable sodium silicate supplier. We will be happy to deliver your desired grade of sodium silicate with your intended purity and additional properties. It is up to you to decide on your preferred packaging method with your chosen weight. Please do not hesitate to contact our experts in this case.


Sodium silicate is an inorganic sodium salt with silicate as the counterion. It has an ion of silicate in it. When solid, sodium silicate takes the form of a powdery or flaked material. This chemical compound has many different grades, each with a unique specific gravity, viscosity, and water concentration. It is helpful to know that water glass is created when silica sand and soda ash combine at a temperature of around 1,100 C. The water glass is crushed, dissolved in water, and digested under pressure with steam to create sodium silicate. The outcome can be engaged in numerous applications, including cement creation, passive fire protection, textile and wood processing, and refractory ceramics, adhesives, and silica gel production.

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