Sandknox is a reputable bentonite supplier, delivering premium bentonite products suited to an extensive array of industrial uses. Rich in montmorillonite, our bentonite excels in swelling capacity, water absorption, and binding strength.
Supported by substantial reserves, cutting-edge processing technology, and rigorous quality standards, we provide dependable bulk bentonite supplies to manufacturers across domestic and global markets.
What is Bentonite?
Bentonite is a naturally occurring mineral composed mainly of montmorillonite, valued for its ability to expand multiple times its original volume when hydrated.
It is widely used in drilling, foundry molds, civil engineering, agriculture, and environmental sealing due to its chemical stability, water retention, and binding strength.
At Sandknox, our bentonite is processed to ensure uniform particle size, purity, and industrial-grade performance.
Why Choose SandKnox for Bentonite?
As a premier bentonite producer, we prioritize uniformity, excellence, and sustained supply dependability:
Vast Mineral Deposits
Millions of tons of top-grade sodium and calcium bentonite to guarantee seamless availability
Bespoke Formulations
Bulk bentonite customized with specific swelling rates, grain sizes, and hydration levels
Cutting-Edge Internal Lab
Maintains reliable viscosity, adhesive qualities, and material makeup
Prime Logistics Edge
Situated close to Kandla and Mundra ports for affordable worldwide delivery
Favored by International Sectors
Consistent provisioning for oil drilling, metal casting, farming, and construction projects.
Technical Advantages
| Parameter | Value |
|---|---|
| Montmorillonite | ≥ 85% |
| Moisture | ≤ 10% |
| Swelling Index | ≥ 24 ml/2g |
| Mesh Size | 200 mesh |
| pH | 9 – 10.5 |
| Liquid Limit | ≥ 400% |
Packaging Options
Applications and Uses of Bentonite Clay
Foundry Industry
Binder in molding sand for metal casting.
Drilling & Civil Engineering
Drilling mud, slurry walls, and tunneling support.
Iron Ore Pelletization
Binding agent.
Cat Litter & Absorbents
High absorption capacity.
Pharmaceuticals & Cosmetics
Used for purity, smooth texture, and inertness.
Animal feed & Agriculture
Soil conditioning and carrier for fertilizers/pesticides.
Key Benefits
High Swelling Capacity
Expands multiple times when hydrated
Superior Water Retention
Enhances performance in drilling, agriculture, and civil engineering
Excellent Binding Properties
Acts as a natural binder in molds, pellets, and feed
Rheology Control
Fine Particle Size Distribution
Ensures uniform dispersion and smooth texture
Fine Particle Size Distribution
Resistant to heat, acids, alkalis, and salts
Bulk Supply & Export Capability
Sandknox is a reliable bentonite exporter, supplying industrial-grade bentonite in bulk to India, Japan, Vietnam, and other international markets.
Our large-scale supply, consistent quality, and strong logistics network ensure timely delivery and dependable performance for all industrial applications.
Ready to order high-purity Bentonite ?
Have any questions? we’ve got answers
Sandknox Bentonite is a premium-quality natural clay rich in montmorillonite, carefully mined from our extensive reserves and processed with advanced technology. It is widely recognized for its exceptional swelling, absorption, and binding properties, making it a trusted solution across multiple industries.
Our Bentonite stands out with:
High montmorillonite content
Superior swelling capacity (up to 10–15 times its volume)
Excellent water absorption and binding strength
Thixotropic behavior (gels when still, flows when stirred)
Available in both sodium and calcium varieties
These properties deliver outstanding performance in demanding applications.
Sandknox Bentonite is trusted by leading companies in:
Oil & gas drilling
Foundry & metal casting
Civil engineering & construction
Agriculture & animal feed
Water treatment & environmental sealing
Paints, cosmetics & pharmaceuticals
At Sandknox, our high swelling and viscosity properties create strong, stable barriers and suspensions. This is critical for drilling fluids, foundry molds, and waterproofing applications, ensuring reliability and efficiency for our customers.
We maintain strict quality standards with consistent montmorillonite content above 80–90%, controlled moisture, and precise rheological properties. Every batch is tested in our advanced in-house laboratory to guarantee uniformity and performance.
Yes. We offer fully customized grades in bulk, tailored to your exact needs — including swelling index, particle size, moisture content, and viscosity. Our technical team works closely with customers to develop the perfect specification.
Sandknox Bentonite is naturally occurring, non-toxic, and chemically inert. It is widely used in animal feed, cosmetics, and water treatment. Standard dust-control measures and proper PPE are recommended during handling, as with any fine powder.