Dr. Elsey's Ultra is the strongest all-around pick in this comparison for dust-sensitive homes.
The gold standard for dust-free clay litter. Rock-solid clumps, very low dust, and excellent day-to-day usability.
A budget-friendly clay litter with aggressive odor control and easy store availability, offset by strong fragrance and more tracking.
Choose Ultra if dust or fragrance bother anyone in the house. Choose Clump & Seal if the price of the bag decides it. Clump & Seal is the cheaper daily habit and hides smell under strong perfume. Ultra weighs a fraction of the dust and adds no scent at all.
This comparison page is maintained by the ReviewCatLitter editorial team and grounded in the same scoring framework used across the published review catalog.
We own Purrify.
Choose between them on texture, clumping, dust and price. Then, if the room still tells you where the box is, Purrify is activated carbon you mix into whichever bag you chose. It is what we use in our own homes.
We take no commission on this link.
Every figure below is a reading from our own test runs, not a rating. Where a run never took a reading it says so.
| Reading | Dr. Elsey's Ultra | Arm & Hammer Clump & Seal | Gap |
|---|---|---|---|
| Dust weighed per pourParticulates caught in the air while the bag goes into the box. Lower is better. | 0.03 mgbetter | 0.45 mg | 0.42 mg |
| Clumps that survived the drop testShare of clumps still whole after a three-foot drop. Higher is better. | 98% | not measured | only one side measured |
| Granules outside the boxCounted inside the 12-inch ring around the tray. Lower is better. | 18 granules | not measured | only one side measured |
| Ammonia after one dayParts per million above the tray, 24 hours in. Lower is better. | not measured | 1 ppm | only one side measured |
| Ammonia after three daysParts per million above the tray, 72 hours in. Lower is better. | not measured | 3 ppm | only one side measured |
| Bag priceWhat the tested bag cost. Bag sizes differ, so read it next to cost per pound. | $20.99 | $16.99 | $4.00 |
| Cost per poundBag price divided by what is in the bag. Lower is better. | $0.52 | $0.45better | $0.07 |
| Cost per dayWhat the box costs to keep running each day. Lower is better. | $0.43 | $0.43 | level |
| Cost across a yearThat daily cost carried over a full year of use. Lower is better. | $157 | $157 | level |
Primary tradeoff: Dr. Elsey's Ultra's weakest area here is tracking.
Best dust control here at 0.03mg per pour.
Clumping is a real edge: rock-solid.
It still lands a stronger overall score than cheaper options because it is more balanced.
| Product | ||
|---|---|---|
| Overall Score | 9.4 | 8.7 |
| Pricing | ||
| Price | $20.99 | $16.99 |
| Weight | 40 lbs | 38 lbs |
| Cost / Day | $0.43 | $0.43 |
| Performance | ||
| Dust Control | 9.4 0.03mg per pour | 6 0.45mg per pour |
| Clumping | 9.8 Rock-solid | 8.1 Good |
| Odor Control | 8.5 Strong unscented control | 9.1 7-day heavy fragrance |
| Tracking Outside the Box | 7.2 Moderate | 6 Tracks heavily |
| Value for Cost | 8.8 $0.43/day · $20.99 | 9 $0.43/day · $16.99 |
| Features | ||
| Type | Clumping Clay | Scented Clumping Clay |
| Flushable | ||
| Scented | No | Yes |
| Our Verdict | ||
| Best For | Dust-sensitive homes | Budget shoppers prioritizing odor control |
| Read ReviewCheck Price | Read ReviewCheck Price | |
Dr. Elsey's Ultra makes the most sense for dust-sensitive homes.
You want the cleanest clay experience with hard clumps and low dust.
You need flushable or lightweight litter.
Arm & Hammer Clump & Seal makes the most sense for budget shoppers prioritizing odor control.
You want a budget-friendly clay litter with aggressive odor control and easy store availability, offset by strong fragrance and more tracking.
You need a formula that solves dust-sensitive homes better.
The nearest options to this matchup on score and on price.
Weighed 0.04mg per pour and runs at $0.56 a day.
Weighed 0.04mg per pour and runs at $0.55 a day.
Runs at $0.80 a day. Its dust was never weighed.
Dr. Elsey's Ultra comes out ahead on the balance of dust, clumping, odor control, tracking and daily cost. Arm & Hammer Clump & Seal is still the one to buy for budget shoppers prioritizing odor control.
Arm & Hammer Clump & Seal runs at $0.43 a day against $0.43 for Dr. Elsey's Ultra.
Arm & Hammer Clump & Seal scored higher: 7-day heavy fragrance, against strong unscented control for Dr. Elsey's Ultra.
Dr. Elsey's Ultra keeps more litter in the box: moderate, against tracks heavily for Arm & Hammer Clump & Seal.
Ultra gives you the hardest clumps and the lightest dust for less money.
Ultra is scoopable clay. PrettyLitter is crystals that change color to flag a health problem.
Clump & Seal is worth the step up from Tidy Cats if smell is the reason you are shopping. Tidy Cats is cheaper by the bag and easier to find.
Two perfumed supermarket clays. Clump & Seal holds smell down longer and clumps harder. Fresh Step is the cheaper bag and pours a little less dust.
Buy Ultra unless your cat has stopped using the box, which is the one job Cat Attract does better.
Cat Attract is what you try when your cat is missing the box. Clump & Seal is what you buy when the bag price decides it.