Bentonite Clay for Toothpaste Abrasives
High-quality toothpaste grade bentonite clay for oral care formulations, offering excellent adsorption, smooth texture and mild abrasive performance.
View productRubber grade bentonite earns its place in a compound in several different ways, and the right grade depends on which job you need it to do. This guide starts with the material as a rubber filler that disperses cleanly, steadies processing and supports tensile strength, hardness and wear resistance, then looks at the same clay as a bentonite clay binder in water-activated waterstop and sealing systems that swell to close a concrete joint. Work through the function cards, the published specification and the scenario table to choose a grade and write a specification you can test against.
Five jobs a bentonite grade can hold in a rubber system. Pick the job first, then match it to the grade family and the specification window in the tables below.
Contributes to tensile strength, hardness and wear resistance alongside your existing filler package.
Modified organobentonite improves gas barrier properties and corrosion resistance.
Acts as a rheology modifier and processing aid, improving processing stability and filler dispersion.
Carries part of the filler load in the compound and reduces production costs.
Expands up to 4–5 times its volume when wetted, forming a waterproof barrier in concrete construction joints.
The sulfur-bentonite form provides controlled release for efficient curing.
Clay competes for space in the same filler package as carbon black, silica, talc, kaolin and calcium carbonate, but it does not do the same job. Compare the roles before you decide what to withdraw from the recipe.
| Filler family | Primary role in a compound | Reinforcement | Barrier contribution | Dispersion behaviour | Position next to clay |
|---|---|---|---|---|---|
| Rubber grade bentonite | Functional mineral additive: reinforcing filler, rheology modifier, processing aid | Moderate, mineral | Strongest when modified to organobentonite | Excellent dispersion performance is a stated product feature | Reference row for this guide |
| Carbon black | Primary reinforcing filler | High | Limited | Disperses with mechanical mixing energy | Not a one-for-one swap; keep the reinforcement package and add clay for function |
| Precipitated silica | Reinforcing filler for tear and hysteresis targets | High | Limited | Usually needs coupling and a longer mixing cycle | Different surface chemistry and mixing route |
| Talc and kaolin | Platy mineral fillers | Low to moderate | Some, from plate shape and alignment | Moderate; orientation matters | Clay brings higher water swelling and a layered structure |
| Calcium carbonate | Extending filler for volume | Low | Limited | Easy to incorporate | Clay adds function where carbonate mainly adds volume |
Positioning: rubber grade bentonite is a functional mineral additive, not a 1:1 carbon black replacement. Keep your existing reinforcement package and add clay where the job is dispersion, rheology, barrier or water-activated sealing.
Filler roles above describe general compound-design practice. Confirm performance in your own polymer, filler package and cure system before changing a production recipe.
The product is Rubber Grade Bentonite. The specification block on the product page carries the grade reference JDS-1. The supplier's own feature list describes how it behaves in the mixer rather than what it is chemically:
Read together with the published specification, these five points describe a mineral additive chosen for processing behaviour first and reinforcement second.
These are the values published for the grade, paired with the decision each one drives when you write an incoming specification.
| Parameter (as published) | Value | What it decides in the compound |
|---|---|---|
| MESH | 325 | Grind fineness. Finer powder separates into platelets faster and feeds more evenly at the mixer. |
| PASSING RATE | 99 % | Consistency of the delivered particle size, and therefore how predictable the dispersion step is. |
| MOISTURE | 10.8 (no unit stated on the product page) | Free moisture affects weigh-up accuracy, dusting and how the clay behaves at the start of the mixing cycle. |
| COLLOID INDEX | 1000 ml/15g | Water-swelling and dispersion capacity. High values suit systems where the clay must delaminate well. |
| MBI | 30 (no unit stated on the product page) | An activity indicator on incoming lots, commonly read as methylene blue index, used as a lot-to-lot consistency check. |
| MONTMORILLONITE | 67–70 % | The active layered mineral content, and the main driver of reinforcement, barrier performance and swelling. |
| WHITENESS | 70% | Powder colour, which matters for light-coloured and coloured rubber goods. |
| SWELLING CAPACITY | 43–90 % | How much the clay expands when wetted, the property the waterstop form depends on. |
The published block presents the grade reference and the parameters together, and gives no unit for moisture or MBI. Confirm the exact designation, mesh, units, tolerances and test methods on the current technical data sheet before the specification is signed off.
A number on a data sheet only protects you if the test behind it is fixed. These are the five points to settle with the supplier before you release a purchase specification.
Three mechanisms explain almost every decision on this page: how the layers separate, how they block gas, and how the waterstop form seals a joint.
Montmorillonite is a layered aluminosilicate: stacks of very thin platelets held together by weak interlayer forces. Shear and moisture work between those layers during mixing and separate them, so one clay particle becomes many high-aspect-ratio platelets with a large surface area exposed to the polymer. That surface interaction is the reinforcement mechanism, and it is why dispersion quality, not the percentage added, decides what you actually get in the compound.
When the platelets align during processing, they form overlapping plates through the rubber. A gas molecule can no longer travel in a straight line: it has to work around each platelet, so the diffusion path lengthens and permeation drops. The size of the effect depends on how well the platelets exfoliate and how they orient, which is why modified organobentonite is linked on the product page with improved gas barrier properties and corrosion resistance rather than with reinforcement alone.
In the waterstop form, bentonite clay is combined with rubber polymers. Dry, the profile behaves like a flexible strip. Once water reaches it, the clay absorbs water and the material expands up to 4–5 times its volume, pressing against the concrete faces of the joint and closing the path the water came through. The product page lists this route for basements, tunnels, subway joints, sewage treatment plants and water containment structures.
Match your problem to a form and a set of parameters to verify, then confirm the grade with a trial in your own compound.
| If your job is… | Use this form | What the product page states | What to verify before you commit |
|---|---|---|---|
| A general rubber compound where dispersion and processing stability are the pain points | Rubber grade bentonite (grade reference JDS-1) | Acts as a reinforcing filler, rheology modifier and processing aid; excellent dispersion performance; improves rubber processing stability | Mesh and passing rate, colloid index, moisture on delivery |
| A compound where gas permeation or corrosion is the constraint | Modified organobentonite / organoclay | Modified organobentonite improves gas barrier properties and corrosion resistance | Montmorillonite content, exfoliation under your mixing route, a barrier loading trial |
| A cure system that needs controlled release | Sulfur-bentonite form | Sulfur-bentonite form provides controlled release for efficient curing | Sulfur level against your accelerator system and scorch safety |
| Cost per kilogram of the filler package | Standard rubber grade bentonite | Reduces production costs while acting as a functional filler | Whiteness if colour matters, moisture, lot-to-lot consistency |
| Concrete construction joints and water containment | Bentonite waterstop | Flexible, water-activated sealing material that expands up to 4–5 times its volume; used for basements, tunnels, subway joints, sewage treatment plants and water containment structures | Swelling capacity, expansion under joint restraint, joint geometry |
| Light-coloured or tinted rubber goods | Rubber grade bentonite | WHITENESS 70% | Whiteness measured against your own colour target |
No recommended dosage is published for this grade. Set your starting point with a laboratory trial in your own polymer and cure system, then step the loading up or down against the property you are targeting.
The product page does not sell through a checkout. It sells through a quote route: Request a Quote in the navigation and the Get The Latest Quote button beside the specification block both lead to an inquiry form, which is the path for pricing, documentation and technical follow-up.
A complete brief gets a faster, more useful answer than a request for a price list. Include the points on the right and ask for the quotation and the technical documentation you need for your incoming specification in the same message.
Grade reference JDS-1 · Modified organobentonite · Sulfur-bentonite · Bentonite waterstop
Keep adjacent product options together for a faster catalog comparison.
High-quality toothpaste grade bentonite clay for oral care formulations, offering excellent adsorption, smooth texture and mild abrasive performance.
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View productno. the product page describes rubber grade bentonite as a functional mineral additive used for processing performance and filler properties. it supports a compound as a reinforcing filler, rheology modifier and processing aid rather than replacing a carbon black reinforcement package one for one.
the product page lists four roles: a reinforcing filler that contributes to tensile strength, hardness and wear resistance; a rheology modifier and processing aid that improves processing stability and filler dispersion; a cost-reduction additive;, in modified form, an organobentonite that improves gas barrier properties and corrosion resistance.
the published block shows mesh 325, passing rate 99%, moisture 10.8, colloid index 1000 ml/15g, mbi 30, montmorillonite 67–70%, whiteness 70% and swelling capacity 43–90%. moisture and mbi are shown without a unit, so confirm units, tolerances and test methods on the current technical data sheet before signing off an incoming specification.
rubber grade bentonite is supplied as a functional mineral additive for rubber compounds. bentonite waterstop is a separate form, described on the product page as a flexible, water-activated sealing material of bentonite clay and rubber polymers that expands up to 4–5 times its volume to create a waterproof barrier in concrete construction joints.
the published range is 67–70% montmorillonite. montmorillonite is the active layered mineral, so it drives reinforcement, barrier performance and water swelling. the colloid index, mbi and swelling capacity values are read alongside it to track consistency from lot to lot.
the product page offers a request a quote route and a get the latest quote button that lead to an inquiry form. send your polymer system, cure system, target property, process and volume so the supplier can respond with a quotation and the technical documentation you need for your incoming specification.
