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.
A crystal litter built around health monitoring and light weight, with a strong subscription convenience angle and weaker clumping value.
Clump & Seal covers smell with fragrance and clumps for far less money. PrettyLitter is unscented crystals that keep an eye on your cat's urine instead. One is a budget decision, the other a health one.
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 picking a litter for 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 | PrettyLitter | Gap |
|---|---|---|---|
| Dust weighed per pourDust caught on a filter and weighed while the bag goes into the box. Lower is better. | 0.45 mg | not measured | only one side measured |
| 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 | $24.00 | $7.01 |
| Cost per poundBag price divided by what is in the bag. Lower is better. | $0.45better | $4.00 | $3.55 |
| Cost per dayWhat the box costs to keep running each day. Lower is better. | $0.43better | $0.80 | $0.37 |
| Cost across a yearThat daily cost carried over a full year of use. Lower is better. | $157better | $292 | $135 |
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 | 8.8Very good |
| Pricing | ||
| Price | $16.99 | $24.00 |
| Weight | 38 lbs | 6 lbs |
| Cost / Day | $0.43 | $0.80 |
| Performance | ||
| Dust Control | 6 0.45mg per pour | 8.6 Very low crystal dust |
| Clumping | 8.1 Good | 4.2 Non-clumping |
| Odor Control | 9.1 7-day heavy fragrance | 8.9 Very good urine odor control |
| Tracking Outside the Box | 6 Tracks heavily | 9.1 Minimal |
| Value for Cost | 9 $0.43/day · $16.99 | 6.8 $0.80/day · $24.00 |
| Features | ||
| Type | Scented Clumping Clay | Silica Crystal |
| Flushable | ||
| Scented | Yes | No |
| Our Verdict | ||
| Best For | Budget shoppers prioritizing odor control | Health monitoring and lightweight convenience |
| 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.
PrettyLitter makes the most sense for health monitoring and lightweight convenience.
You care more about health signals and easy lifting than classic clumping performance.
You want traditional scoopable clumps or the best value per pound.
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. PrettyLitter is still the one to buy for health monitoring and lightweight convenience.
Arm & Hammer Clump & Seal runs at $0.43 a day against $0.80 for PrettyLitter.
Arm & Hammer Clump & Seal scored higher: 7-day heavy fragrance, against very good urine odor control for PrettyLitter.
PrettyLitter keeps more litter in the box: minimal, 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.
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.
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.