Sodium Silicate Supplier in India: Neutral and Alkaline Grades
Sudarshan Group is a sodium silicate supplier in India serving industrial buyers with neutral and alkaline grades of sodium silicate, also known as water glass. It is made by heating a mixture of soda ash and silica at a very high temperature, and it offers useful properties that no other alkaline salt shares, at a low cost.
That combination is why it turns up in cement manufacturing, detergents, textiles, refractories, lumber processing, automotive applications and passive fire protection. If you are comparing a sodium silicate supplier in India for regular supply, or a sodium silicate exporter for overseas orders, this page sets out the grades, specifications, applications and buying points you need to evaluate.
- GradesNeutral and alkaline
- FormsLiquid and solid
- Liquid Baumé40 °Bé
- Ratio (Na2O : SiO2)1 : 3.44
- Group experienceSince 1975
What is sodium silicate (water glass)?
Sodium silicate is the common name for a family of soluble compounds built from sodium oxide (Na2O) and silicon dioxide (SiO2). In trade it is called water glass, waterglass or liquid glass. It is sold as a thick, translucent liquid or as a solid, and the ratio of silica to soda can be adjusted, which is why one chemistry can act as a detergent builder, a foundry binder or a concrete sealer.
Because the properties change with that ratio, choosing the right grade matters more than choosing the lowest quote, especially when you shortlist a sodium silicate supplier in India for repeat orders. The next two sections explain how grades and forms differ.
Sodium silicate grades and forms we supply
Neutral grade
Richer in silica, with a SiO2 : Na2O ratio above 2.85 by the usual convention. Typically chosen where bonding strength and heat resistance matter, such as adhesives, foundry work and refractories.
Alkaline grade
Higher in soda, with a ratio below 2.85 and stronger alkalinity. Typically chosen for detergents, soaps and water treatment, where alkalinity and solubility come first.
Liquid sodium silicate
A thick, viscous, translucent liquid free from dirt and suspended impurities. It is the most widely used form because it is easy to meter, pump and mix into a process.
Solid sodium silicate
Available where the application calls for a solid form. It is dissolved at the point of use, which suits buyers who prefer to prepare their own solution.
Sodium silicate specifications: modulus, Baumé and density
| Liquid Sodium Silicate: Physical and Chemical Characteristics | |
|---|---|
| Appearance | Thick viscous translucent liquid free from dirt and suspended impurities |
| Color | White or slightly gray |
| Baumé (°Bé) | 40 |
| Na2O | 8.59% |
| SiO2 | 29.57% |
| Purity | 38.16% |
| Ratio (Na2O : SiO2) | 1 : 3.44 |
| pH | 11.50 |
| Specific gravity at 27°C | 1.38 |
How to read these numbers
Silicate modulus is the SiO2 : Na2O ratio. A higher ratio means more silica and lower alkalinity. A lower ratio gives a more alkaline, more soluble silicate. Baumé and specific gravity describe density, so a higher Baumé points to a more concentrated solution. When you request a quote, quoting the ratio and Baumé you need removes most of the back-and-forth.
| Chemical Analysis of Raw Material (SiO2 60.00%) | |
|---|---|
| Specific gravity | 1.5 |
| Insoluble matter | 0.2 |
| Silicates | 45.1 |
| Ratio | 1 : 2.21 |
| Co | nil |
| Cr | nil |
| Fe | 31 |
| Ni | nil |
| Twadle | 111 |
Need a different ratio or concentration? Share your requirement and we, as a sodium silicate supplier in India, will confirm what can be supplied. For alkaline-grade figures, contact us with your application.
Sodium silicate for detergent, foundry, paper, textile and more
Detergents and soaps
Acts as a builder, helps stop dirt and stains redepositing on fabric, and supplies the alkalinity and stability that lift grease and oil.
Foundry and metal casting
Binds sand in foundry molds and in precision casting molds, giving dimensional accuracy and strength. Also used in welding rods.
Paper and board
Serves as an adhesive and binder in paper and board processing, and as a pH stabiliser in pulp and paper manufacturing.
Textile processing
Provides the alkaline environment needed for reactive dyeing and is used to stabilise peroxide bleaching baths.
Construction and cement
Works as an alkali-activator in alkali-activated cement and as an admixture that improves compressive strength, durability and waterproofing. Also binds fiber cement boards.
Water treatment and agriculture
Controls pH and helps prevent scale in water systems. In agriculture it is used as a soil stabiliser and as a component of liquid fertilizers.
It is also used in refractories, lumber processing, automotive sealing, passive fire protection and the clarification of wine and beer. As a sodium silicate supplier in India, we match the grade to each of these processes.
Where sodium silicate performs hardest
Waterproofing and durability in construction
Sodium silicate enhances waterproofing and improves durability by sealing the pores, capillaries and larger cracks in cementitious materials. Applied to a concrete surface or used as an admixture, it reacts with free calcium hydroxide in the concrete to form calcium silicate hydrate, the same binding compound that gives cement its strength. That reaction fills the pore network, so the surface becomes denser, harder and less permeable to water.
For construction chemical producers, contractors and cement users, this makes it a cost-effective input for several jobs:
- Waterproofing treatments for floors, roofs and basements
- Surface hardening and dust-proofing of concrete
- Alkali-activator in alkali-activated cement
- Binder in fiber cement boards
- Soil stabilisation where ground is weak or waterlogged
Bonding metals, foundry molds and refractories
The inorganic bond formed by sodium silicate is strong, tough and rigid. Mixed with other materials it forms a durable bond that withstands high temperatures and harsh environments, which is why it is a standard choice for foundry molds, welding rods and refractory materials.
In foundries, sand is mixed with sodium silicate and then hardened, commonly by passing carbon dioxide through it. This gives fast, repeatable mold and core production with good dimensional accuracy, and it is used in precision casting molds for steel, iron and aluminium parts.
- Sand binder for foundry molds and cores
- Coating and flux binder for welding rods
- Binder and high-temperature adhesive in refractories, furnace and kiln linings
- Inorganic bonding of metals and other surfaces where an organic adhesive would fail under heat
Detergent and soap manufacturing
In detergent and soap production, sodium silicate is a key ingredient. It acts as a builder that improves cleaning efficiency by helping prevent dirt and stains from redepositing on fabric, and it supplies the alkalinity and stability that help lift grease, oil and other tough stains.
In laundry bars and detergent cakes it also adds body, helping the bar stay firm during use. Formulators often pair it with other builders such as STPP and zeolite to balance cost and performance.
- Builder in powder and liquid detergents
- Alkalinity and stability for cleaning formulations
- Anti-redeposition of dirt and stains
- Hardening and filler role in laundry bar soaps
Alkaline grades are typically chosen for detergents and soaps. Share your formulation and monthly volume, and our team, a sodium silicate supplier in India, will confirm the grade and form that fits.
Key properties that make sodium silicate so widely used
Composition and solubility
Primarily sodium oxide (Na2O) and silicon dioxide (SiO2), available in solid and liquid forms. Solubility varies with the Na2O to SiO2 ratio, so it can be matched to the application.
Binding and adhesion
Mixed with other substances, it forms a strong, durable bond that tolerates high temperatures and harsh conditions, useful for foundry molds, welding rods and refractories.
pH buffering and corrosion inhibition
It acts as a buffering agent that prevents sharp pH swings in water treatment, detergents and pulp and paper manufacturing, and it helps protect metal surfaces from rust.
Fire resistance and heat insulation
Applied to materials, it forms a protective barrier that slows the spread of flame. It is also an effective heat insulator in construction and automotive uses.
Sodium silicate supplier in India: price, packaging and bulk supply
Sodium silicate price in India is not a flat figure. The rate per kg or per ton moves with these factors:
- Grade and silicate modulus
- Concentration (Baumé) and form, liquid or solid
- Order quantity and packaging type
- Delivery location and freight
To get an accurate quotation for bulk supply, send us the grade, form, monthly volume, packaging preference and delivery location or port. We confirm packaging options and dispatch schedule against your enquiry. Call +91-9983250000 or write to info@sudarshangroup.net.
Safe handling and storage of sodium silicate
- Protect yourself. The solution is strongly alkaline (pH 11.50 in our liquid specification), so use gloves and eye protection.
- Keep it away from acids. Acids make sodium silicate gel and release heat.
- Choose containers carefully. Avoid aluminium and galvanised surfaces, which alkaline solutions attack.
- Keep it sealed. Exposure to air can form a crust, so close containers tightly after use.
- Follow the safety data sheet for your grade.
How to choose a sodium silicate supplier in India
- Match grade to process. Confirm whether your application needs a neutral or alkaline grade and what modulus it expects.
- Ask for the full specification. A serious sodium silicate supplier states Baumé, Na2O, SiO2, ratio, pH and specific gravity, as shown above.
- Check batch consistency. Request a certificate of analysis so the ratio and density you order are the ones you receive.
- Confirm form and packaging. Liquid or solid, pack size and dispatch schedule should be settled before the first order.
- Test responsiveness. A supplier that answers specification questions quickly is easier to rely on for repeat bulk orders.
Why buyers choose Sudarshan Group as their sodium silicate supplier in India
Experience since 1975
A group built over decades in industrial minerals and chemicals, led by Mr. R. P. Gupta, Mr. R. K. Gupta and Mr. Neeraj Gupta.
Two grades
Neutral and alkaline sodium silicate, so you can match the grade to your process.
Liquid and solid forms
Choose the form that suits your plant and handling setup.
Published specifications
Baumé, Na2O, SiO2, ratio, pH and specific gravity are listed openly on this page.
Quality-focused manufacturing
Production is run under hygienic conditions, using the right proportions of materials to form the correct chemical.
Export-ready
As a sodium silicate supplier in India, we also export, and the group has an international arm, Sudarshan International in Vietnam.
Related chemicals from the same group: Soda Ash Light, Soda Ash Dense, STPP, Zeolite and Silica Powder.
Sodium silicate supplier in India: frequently asked questions
Who is a dependable sodium silicate supplier in India?
Sudarshan Group, based in Mumbai, supplies sodium silicate in neutral and alkaline grades and in liquid and solid forms. The group has been in industrial minerals and chemicals since 1975 and publishes its liquid specification (Baumé, Na2O, SiO2, ratio, pH, specific gravity) on this page. Call +91-9983250000 or email info@sudarshangroup.net to discuss your requirement.
What is the sodium silicate price in India?
There is no single price, because the rate per kg or per ton depends on the grade and modulus, the concentration (Baumé), the form (liquid or solid), the order quantity, the packaging and the delivery location. Send us your requirement on +91-9983250000 or info@sudarshangroup.net and we will respond with a quotation.
Which grades of sodium silicate do you offer?
We offer two grades: neutral grade and alkaline grade. By the usual convention, grades with a SiO2 : Na2O ratio above 2.85 are called neutral and those below 2.85 are called alkaline. Neutral grades are typically chosen for bonding and heat-resistant uses, while alkaline grades are typically chosen for detergents, soaps and water treatment.
What is the silicate modulus and why does it matter?
The silicate modulus is the ratio of silica (SiO2) to sodium oxide (Na2O). A higher modulus means more silica and lower alkalinity, while a lower modulus means a more alkaline, more readily soluble silicate. Our liquid sodium silicate specification on this page shows a Na2O : SiO2 ratio of 1 : 3.44.
What are the Baumé and density values of your liquid sodium silicate?
The liquid sodium silicate specification we publish shows 40 °Bé and a specific gravity of 1.38 at 27°C, with a pH of 11.50. It contains 8.59% Na2O and 29.57% SiO2. If you need a different ratio or concentration, share your requirement and we will confirm what can be supplied.
Which industries use sodium silicate?
Our sodium silicate is used by industries across India in detergents and soaps, foundry and metal casting, paper and board adhesives, textile processing, cement and construction, water treatment and agriculture. It also appears in refractories, lumber processing, automotive sealing, passive fire protection and wine and beer clarification.
Do you supply liquid sodium silicate as well as solid?
Yes. As a sodium silicate supplier in India, we offer sodium silicate in both liquid and solid forms, depending on what your application needs. Liquid is the most widely used form because it is easy to meter and mix, while solid is dissolved at the point of use.
What packaging and bulk quantities are available?
Pack size, quantity per dispatch and the dispatch schedule are confirmed against your enquiry. To get an accurate answer quickly, tell us the grade, the form, your monthly volume and your preferred packaging when you contact us.
Do you export sodium silicate, and how do I place a bulk order?
Yes, we export sodium silicate. For a bulk or export order, send the grade, form, quantity and delivery location or destination port to info@sudarshangroup.net or call +91-9983250000. The Sudarshan Group also has an international arm, Sudarshan International in Vietnam.
How should sodium silicate be handled and stored?
Sodium silicate is strongly alkaline, so wear gloves and eye protection when handling it. Store it in tightly closed containers, away from acids, and avoid aluminium and galvanised surfaces. Keep containers sealed because contact with air can form a crust. Always follow the safety data sheet for your grade.
Talk to a sodium silicate supplier in India that publishes its specifications
Whether you need liquid or solid, neutral or alkaline, Sudarshan Group can supply sodium silicate against a clear specification. Send your grade, quantity and delivery location to info@sudarshangroup.net or call +91-9983250000. Our office is at 1004, B-Wing, Express Zone, W.E. Highway, Goregaon East, Mumbai 400063.
