Arm & Hammer Clump & Seal is the strongest all-around pick in this comparison for budget shoppers prioritizing odor control.
A budget-friendly clay litter with aggressive odor control and easy store availability, offset by strong fragrance and more tracking.
Extremely low-dust paper pellets that work best for surgery recovery, declawed cats, or severe dust sensitivity rather than everyday clumping use.
Two opposite answers to a smelly box. Clump & Seal buries it under fragrance. Ökocat is fragrance free and dust free, and asks you to change the whole tray more often instead.
This comparison page is maintained by the ReviewCatLitter editorial team and grounded in the same scoring framework used across the published review catalog.
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.
Read our Purrify guide to plant-based litter and odor control.
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 | Arm & Hammer Clump & Seal | Ökocat Paper Pellet | Gap |
|---|---|---|---|
| Dust weighed per pourDust caught on a filter and weighed while the bag goes into the box. Lower is better. | 0.45 mg | 0.00 mgbetter | 0.45 mg |
| Ammonia after one dayParts per million above the tray, 24 hours in. Lower is better. | 1 ppm | not measured | only one side measured |
| Ammonia after three daysParts per million above the tray, 72 hours in. Lower is better. | 3 ppm | not measured | only one side measured |
| Bag priceWhat the tested bag cost. Bag sizes differ, so read it next to cost per pound. | $16.99 | $19.99 | $3.00 |
| Cost per poundBag price divided by what is in the bag. Lower is better. | $0.45better | $1.00 | $0.55 |
| Cost per dayWhat the box costs to keep running each day. Lower is better. | $0.43better | $0.52 | $0.09 |
| Cost across a yearThat daily cost carried over a full year of use. Lower is better. | $157better | $190 | $33 |
Neither run recorded clumps that survived the drop test and granules outside the box, so those rows are left out rather than filled in from a similar bag. The full test data shows every reading we have.
Primary tradeoff: Arm & Hammer Clump & Seal's weakest area here is dust control.
Strongest odor control in this set with 7-day heavy fragrance.
It is also the cheapest daily option at $0.43 per day.
Scroll sideways to see every litter. Scores are editorial judgments out of 10.
| Product | ||
|---|---|---|
| Overall Score | 8.7Very good | 8.2Good |
| Pricing | ||
| Price | $16.99 | $19.99 |
| Weight | 38 lbs | 20 lbs |
| Cost / Day | $0.43 | $0.52 |
| Performance | ||
| Dust Control | 6 0.45mg per pour | 10 0.00mg per pour |
| Clumping | 8.1 Good | 2.1 Non-clumping pellets |
| Odor Control | 9.1 7-day heavy fragrance | 7.2 Fine with frequent changes |
| Tracking Outside the Box | 6 Tracks heavily | 8.9 Low |
| Value for Cost | 9 $0.43/day · $16.99 | 7.4 $0.52/day · $19.99 |
| Features | ||
| Type | Scented Clumping Clay | Paper Pellet |
| Flushable | ||
| Scented | Yes | No |
| Our Verdict | ||
| Best For | Budget shoppers prioritizing odor control | Post-surgery or severe dust sensitivity |
| Read ReviewCheck Price | Read ReviewCheck Price | |
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 budget shoppers prioritizing odor control better.
Ökocat Paper Pellet makes the most sense for post-surgery or severe dust sensitivity.
You want extremely low-dust paper pellets that work best for surgery recovery, declawed cats, or severe dust sensitivity rather than everyday clumping use.
You need a formula that solves budget shoppers prioritizing odor control better.
The nearest options to this matchup on score and on price.
Weighed 0.48mg per pour and runs at $0.47 a day.
Weighed 0.52mg per pour and runs at $0.35 a day.
Weighed 0.42mg per pour and runs at $0.40 a day.
Arm & Hammer Clump & Seal comes out ahead on the balance of dust, clumping, odor control, tracking and daily cost. Ökocat Paper Pellet is still the one to buy for post-surgery or severe dust sensitivity.
Arm & Hammer Clump & Seal runs at $0.43 a day against $0.52 for Ökocat Paper Pellet.
Arm & Hammer Clump & Seal scored higher: 7-day heavy fragrance, against fine with frequent changes for Ökocat Paper Pellet.
Ökocat Paper Pellet keeps more litter in the box: low, against tracks heavily for Arm & Hammer Clump & Seal.
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 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.
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.
Boxiecat is the quiet, unscented, easy-scoop bag. Clump & Seal is the cheap, heavily perfumed one.
Two Arm & Hammer clays built for different things. Clump & Seal is about fragrance and a low bag price.