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Bentonite - Sodium & Calcium Bentonite for Drilling, Foundry & Industrial Use

Bentonite supplied by Aapas Salt and Minerals Private Limited is a smectite clay mineral (predominantly montmorillonite) with exceptional swelling, viscosity-building, and adsorptive properties. We supply both Sodium Bentonite and Calcium Bentonite in multiple processing grades, catering to oil & gas drilling, civil engineering, foundry, pelletizing, agriculture, and specialty chemical industries.
Our bentonite is sourced from high-yield deposits in Rajasthan and Gujarat — India’s primary bentonite-producing states — and processed to achieve consistent rheological performance.

product-bentonite

Technical Specifications

Parameter

Sodium Bentonite

Calcium Bentonite

Technical Specifications

Sodium Bentonite Specifications

Montmorillonite Content: ≥ 70%

Free Swelling Index: ≥ 24 ml/2g

Moisture Content: 10–15% max

Viscosity (API): ≥ 30 cP

Filtrate Loss (API): ≤ 15 ml

pH: 8.5–10.5

Colour: Off-White to Light Grey

Mesh Size: 100, 200, 325 mesh

Packaging: 25kg / 50kg HDPE Bags, FIBC

Montmorillonite Content: ≥ 50%

Free Swelling Index: 5–15 ml/2g

Moisture Content: 10–15% max

Viscosity: As per application

pH: 7.0–9.0

Colour: Off-White to Cream

Mesh Size: As per specification

Packaging: 25kg / 50kg HDPE Bags, FIBC

Available Grades:

API Drilling Grade (OCMA)

Conforms to API 13A / IS 6911 specifications. For water-based drilling fluids and workover applications in the oil & gas sector.

Foundry Grade

High green strength and thermal stability for sand casting mould binding.

Civil Engineering Grade

Slurry wall construction, landfill liner sealing, borehole grouting.

Pelletizing Grade

Used as binder in iron ore pelletization.

Agricultural / Granulation Grade

Soil conditioner and carrier for agrochemical granules.

Calcium Bentonite (Fuller's Earth type)

For absorbent, cat litter, and edible oil bleaching applications.

Key Applications:

Drilling mud formulation

(HDD, water well, oil & gas)

Foundry sand binding

(green sand casting)

Waterproofing and geotechnical engineering

(slurry trenches, cut-off walls)

Edible oil decolorisation

(calcium bentonite / activated)

Iron ore and coal pelletizing

Cat litter and pet absorbents

Cosmetics and pharmaceutical carrier

Fertilizer granulation and soil amendments

Packaging & Supply

25-50 kg

25 / 50 kg

HDPE bags

500 kg - 1 MT F

500 kg / 1 MT

FIBC bags

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Bulk Container Load

loose supply

Loose Supply

Industries We Serve Bentonite

Foundry & Metal Casting
Drilling
Iron Ore Pelletizing
Steel Industry

Reliable Quality. Consistent Performance.