Cat litter grade bentonite is sodium bentonite sized and dedusted for clumping litter. Brands and contract packers who add their own fragrance and pack the litter buy it as a raw material, instead of buying finished bags.
Technical Specifications
Sodium vs calcium bentonite: which do you need?
Sodium bentonite swells many times its size in water and forms a seal or gel; calcium bentonite barely swells and is valued as an absorbent carrier. That one property decides who buys each grade. This page covers sodium bentonite.
| Sodium bentonite | Calcium bentonite | |
|---|---|---|
| Key behaviour | Swells strongly, forms gel and low-permeability seal | Low swell, high absorbency, holds liquids |
| Granule uses | Pond, lake and canal sealing; borehole and well annulus sealing; landfill and geosynthetic clay liners; clumping cat litter | Carrier granules for pesticides, bio-fertilizers and micronutrients (10x20, 16x35 mesh); soil conditioner; non-clumping litter; oil and spill absorbent |
| Powder uses | Drilling mud (oil, water well, HDD); iron ore pelletizing binder (75 micron); foundry green sand; sulphur-bentonite fertilizer (90:10); diaphragm wall and piling slurry; wine and juice fining | Fertilizer granulation binder; bleaching earth after acid activation (edible oil refining); ceramics; cosmetics and face packs |
| Main buyers | Drilling contractors, steel and pellet plants, foundries, cat litter brands, pond and landfill contractors, GCL makers, sulphur fertilizer makers | Agrochemical and bio-fertilizer formulators, NPK plants, oil refineries, ceramic and cosmetic makers |
| Tests buyers ask for | Swell index (ml/2g), gel/viscosity, fluid loss, moisture, mesh | Absorption (oil/water), crush strength, mesh, moisture, pH, dust |
Much “sodium bentonite” sold in India is calcium bentonite treated with soda ash (activated sodium). Ask for the swell index (ml/2g) and whether a grade is natural or activated before you order.
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For: Cat Litter Grade Bentonite
Who this is for
Cat litter brands that use a contract packer, small packers who screen and bag their own litter, and private label owners who want to control the raw material. If you want finished litter in your bags instead, see the private label pages.
What litter makers specify
Swell index and clump strength decide how hard the clump is. Granule size distribution and fines decide dust and tracking. Moisture decides shelf life and weight. Agree each limit and its test method, and keep an approved reference sample from the first lot.
Related Products
View full categoryFrequently Asked Questions
Can calcium bentonite be used for cat litter?
It absorbs, but it does not form hard clumps. Clumping litter needs sodium bentonite.
Do you supply unscented granules only?
Yes, unscented granules for packers who add fragrance on their own line; we also make scented finished litter.
Where are the private label options?
On our private label cat litter pages: packing and artwork, OEM formulation, and how we work.