The short answer
CATPAK identifies attapulgite in its clumping litter. For comparison, Purina Tidy Cats’ clay clumping category and Fresh Step’s clumping litter with Febreze identify sodium bentonite. Among the consumer products verified for this guide, CATPAK is the attapulgite example; this is not an exhaustive list of brands or evidence that CATPAK is the only one. CATPAK publishes this guide and sells one of the products listed.
First, separate the four terms
Attapulgite (palygorskite)
These names refer to the same mineral. The USDA technical evaluation describes elongated crystals with internal channels and little swelling. This structure helps explain liquid uptake, but it is not a recipe for a finished litter. Our attapulgite explainer separates the mineral from the formulated product.
Geographic names also need care. Florida’s mining authority describes a fuller’s-earth deposit extending from Florida into Georgia. That geological description does not identify the source of a particular bag of litter, and this guide does not assign a mine to any listed product.
Bentonite (sodium bentonite)
Bentonite is a clay material; the sodium form is associated with swelling in water. A mineral producer’s material description documents that swelling behaviour. Purina identifies sodium bentonite as the principal clay in its clumping category. Use the complete ingredient name when comparing products: a disclosure that says only bentonite does not establish the sodium form.
"Clay litter" as a retail category
A shelf tag saying clay does not tell you which mineral is inside. Even fuller’s earth is an umbrella term: Florida’s definition encompasses material consisting largely of montmorillonite or palygorskite. A retail category is useful for finding products, but it cannot substitute for a composition statement tied to the product you intend to buy.
"Lightweight" and "non-clumping" as marketing labels
These labels describe a product characteristic or maintenance format, not a specific mineral. Purina’s category explanations distinguish lightweight clumping mixtures from non-clumping clay and other materials. Neither label proves the presence of attapulgite. Look for a mineral disclosure separately, then check the use instructions rather than inferring one from the other.
The comparison at a glance
Rows identify consumer products, not every formula sold under a brand. “Clumps?” records the manufacturer’s product designation, not a test of clump quality. Package formats refer to the linked listings; stock depends on the seller and location.
| Brand | Primary mineral | Clumps? | Packaging | Where you buy it |
|---|---|---|---|---|
| CATPAK | Attapulgite | Yes, formulated | Resealable reusable tub | CATPAK online collection |
| Purina Tidy Cats Free & Clean |
Sodium bentonite | Clumping designation | Jug, pail, box; bag bundle in box | Retailers listed by Purina |
| Fresh Step Odor Shield with Febreze |
Sodium bentonite | Clumping designation | Box | Retailer options on product page |
| Arm & Hammer Clump & Seal Multi-Cat |
Bentonite form not specified |
Clumping designation | Not established from the manufacturer disclosure used here | |
These rows establish the disclosed material and format only. They do not score dust, odour, tracking or clump strength. The narrower product names matter: another range from the same brand may have a different composition and should be checked separately.
Use the table to identify a product to investigate, then open its current listing. Check whether the product’s full name, pack photograph and selected size agree. A familiar brand name on a search result is not enough to establish that the product matches the formulation described here.
CATPAK: attapulgite in a clumping formula
CATPAK's litter is 100% natural attapulgite, processed into a clumping formula, sold in a resealable reusable tub. The approved product statements are Natural odour control for up to 20 days — ammonia removal rate 98% and tested dust emission <0.35%. These figures describe this finished product and are not properties of the mineral category. The four-tub product listing and cat-litter collection provide the product context.
Purina Tidy Cats: Free & Clean
Purina’s ingredient FAQ identifies its clay clumping category as primarily sodium bentonite. The Free & Clean listing names a clumping product and offers several package formats. The table uses this named example rather than treating every Tidy Cats product as the same material.
Fresh Step: Odor Shield with Febreze
Fresh Step’s ingredient FAQ identifies sodium bentonite in its clumping litter with Febreze. Its Odor Shield listing presents a clumping product in boxes, with retailer shopping options. The mineral entry here applies to that clay clumping example, without extending it to the brand’s other litter types.
Arm & Hammer: a disclosure that stops at "bentonite"
Church & Dwight’s ingredient disclosure for Clump & Seal Multi-Cat lists bentonite, alongside dolomitic limestone. It does not state the sodium form. That is exactly the distinction this guide keeps asking for: a disclosure reading only bentonite establishes the clay family, not which bentonite. We record what the manufacturer published and stop there, rather than inferring the sodium form from the fact that the product clumps.
Why a shelf tag rarely names the mineral
Two separate facts appear in Oil-Dri Corporation of America’s FY2025 annual report: the minerals it mines include “calcium bentonite, attapulgite and diatomaceous shale”, and its output includes “private label cat litters”. Its minerals page describes the same mineral group.
Those two facts do not join up into a route from a named mine to a named retail formula, and this guide does not join them. They do explain the gap a shopper runs into. A store-brand bag is produced to a retailer’s specification, so the mineral identity — where it is recorded at all — sits with the supplier rather than on the front of the pack. That is why the check here is the ingredient statement for the exact product, not the category word on the shelf.
A mineral name is not a performance claim
Attapulgite takes liquid into a channelled structure; sodium bentonite swells and holds liquid within a clump. The USDA account of attapulgite’s structure and the sodium bentonite material description explain different physical behaviours. Neither behaviour is automatically better.
Dust, clumping, tracking and odour depend on the finished formulation, the box setup and the cat, not on the mineral name. Granule processing and added ingredients are part of the product, while filling and cleaning are part of its use. A structure diagram cannot tell you how any competitor’s litter performs in your home.
Five things to check before choosing
- Identify the exact formula. Record the full product name, market and ingredient wording. Keep a photo of the label so a later purchase can be checked against the same product. If you contact a manufacturer, ask for the main mineral in that exact item and include its product code.
- Read the maintenance instructions. Check the clumping designation, recommended fill level and removal routine. Choose a routine you can follow consistently, and use the product according to its own instructions.
- Check the package. Consider the opening, closure and storage space. Compare the actual container you will receive rather than assuming that every size uses the same packaging.
- Compare like with like. Separate mineral composition from product test results. For any numerical claim, look for the method, conditions and named product before comparing it with another number. Two percentages with different measurement methods do not create a usable comparison just because both appear on a label.
- Observe your own setup. Note your cat’s acceptance, the cleaning routine and what you actually see around the box. Change one purchasing variable at a time where practical, so observations remain useful.
Frequently asked questions
Does attapulgite control odour better than bentonite?
Not automatically: the mineral name does not settle it. Odour outcomes depend on the finished formulation, the box setup and the cat. A mineral structure description cannot establish a comparison between products; that would require a suitable comparative test.
Does attapulgite cat litter clump?
A finished attapulgite litter can be formulated to clump, as CATPAK’s is. The raw mineral’s limited swelling does not dictate the behaviour of every finished product. Read the product’s clumping designation and maintenance instructions together.
Is lightweight litter another name for attapulgite?
No. Lightweight is a product label, not a mineral identity. Purina describes its lightweight clumping category as clay combined with lighter materials, which illustrates why that label cannot identify attapulgite.
How can I check which mineral is in a litter?
Start with the exact product name and its current ingredient statement. Match the formulation and market before relying on a source; a brand may sell several material types. If the mineral is not disclosed, ask the manufacturer rather than filling the gap from a retailer’s category label.
The distinction between lightweight labels and composition is documented in Purina’s product FAQ.
About this comparison
CATPAK sells one of the listed products. Check the linked manufacturer and technical sources, including the exact product name and market, before buying. We have not tested competitor products and make no claim about how they perform. Inclusion means a composition or format could be documented; omission does not establish that another brand lacks a particular mineral. The images are illustrations, not competitor packaging or test evidence.
The technical documents below describe materials, while the manufacturer pages describe products and packaging. Those are different kinds of evidence. A mineral document can explain a channel or swelling mechanism without confirming a retail product’s composition, and a product listing cannot establish how every litter made from that mineral behaves.
