Bentonite
Offering a combination of swelling, binding and rheology-modifying properties, Bentonite provides suspension, sealing, and viscosity control for foundries, civil piling, drilling, and coatings.
Product Overview: Colloidal Bentonite
Bentonite is a high-grade colloidal clay mineral consisting predominantly of montmorillonite. Offering a powerful combination of swelling, binding, and rheology-modifying properties, it is widely utilized across foundry, civil construction, coatings, adhesives, and oil & gas formulations where suspension stability, sealing, and viscosity control are paramount.
Its high water absorption and colloidal expansion help build viscosity, improve cohesion, and prevent particulate settling. In foundry sand systems it supports mould integrity and thermal shock resistance, while in coatings, adhesives, and civil diaphragm walls it imparts thixotropy, impermeable sealing, and controlled application behavior.
Key Benefits
High Swelling Capacity
Provides strong water absorption and expansion for impermeable sealing barriers.
Excellent Binding Strength
Improves cohesion and structural integrity in green sand foundry moulds.
Good Thixotropic Behaviour
Supports controlled viscosity and shear-thinning flow in drilling fluids.
Strong Suspension Properties
Helps reduce settling and keeps heavy particles uniformly suspended.
Effective Sealing Performance
Supports low-permeability systems for diaphragm walls and landfill liners.
Consistent Rheology Control
Helps maintain stable flow characteristics across varied pH and temperatures.
Applications
Foundry Green Sand
Civil Piling & Diaphragm
Oil & Gas Drilling Mud
Paints & Coatings
Technical Specifications
| Parameter | API Premium | API Standard | Piling Grade | Foundry Grade | Agricultural |
|---|---|---|---|---|---|
| Montmorillonite | ≥ 90% | ≥ 85% | ≥ 80% | ≥ 75% | ≥ 60% |
| Swelling Volume | 32 ml/2g | 28 ml/2g | 24 ml/2g | 20 ml/2g | 15 ml/2g |
| pH (6% Slurry) | 9.8 | 9.5 | 9.2 | 9.0 | 8.5 |
| Moisture Content | 8.5% | 9.5% | 10.5% | 11.5% | 13.0% |
| Grit Content | < 0.5% | < 1.0% | < 1.5% | < 2.5% | < 5.0% |
| Gel Time (Sec) | Instant | Instant | < 5s | < 10s | > 30s |
| Liquid Limit | 450% | 400% | 350% | 300% | 200% |
| Passing 200 Mesh | 98.5% | 97.0% | 95.0% | 92.0% | 85.0% |
Why Choose Us?
High Montmorillonite Purity
Selected sodium and activated bentonite deposits delivering ≥ 85% active montmorillonite content.
API-13A Compliant Testing
Strict quality control testing for liquid limit, swelling index, marsh funnel viscosity, and grit content.
Customized Industrial Grades
Available in API Drilling Grade, Foundry Premium Grade, Civil Piling Grade, and Agricultural Grades.
Prompt Logistics & Supply
Large processing capacity ensuring uninterrupted dispatches in 25 kg, 50 kg, and 1 MT jumbo bags.