ARM & Hammer Ultra Last Clumping Cat Litter Unscented MultiCat 18 Lbs. Pet Friendly with…
- Cat Litter
- 18 pounds
- 18 pounds
- 18 pounds
- More reviewed than 76%
An unscented, baking-soda-based clumping litter built for multi-cat use, useful when fragrance-free is the priority over a lighter bag.
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How it ranks among the 155 cat litter we track
4.3★ across 6,900 Amazon ratings, Bayesian-smoothed toward the category average.
6,900 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
10,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 155 cat litter we track - how the scorecard works · full cat litter data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
This 18 lb bag of ARM & Hammer Ultra Last is a clumping, unscented cat litter that leans on baking soda rather than fragrance for odor control in multi-cat homes.
Baking soda is Arm & Hammer's signature odor approach across its product lines, and here it's paired with a granule-form litter built to hold up under multiple cats. Choosing unscented over a fragranced formula matters for cats and owners sensitive to perfumed litter, since fragrance is one of the more common reasons cats avoid a box. The material blend is mineral and plant derivatives rather than pure clay.
- 18 lb bag, granule-form clumping litter
- Unscented formula with baking soda odor control
- Built for multi-cat households
- Mineral and plant-derivative material blend
Who it's for
Multi-cat households wanting fragrance-free odor control are the target buyer here. Owners chasing a lightweight bag should note this is a standard-weight formula.
Strengths and trade-offs
Drawn from this product's published specifications.
- Unscented, avoids fragrance some cats reject
- Baking soda odor control built in
- Rated for multi-cat households
- Standard bag weight, not marketed as lightweight
- Granule texture may feel coarser than pebble-style litter
Performance notes
The granule form is built to clump for scooping while baking soda handles ammonia odor as it builds up across multiple cats and boxes. Because it's unscented, the odor control has to come entirely from the baking soda and mineral blend rather than fragrance masking it.
Specifications
| Brand | ARM |
|---|---|
| Model | 033200975465 |
| Dimensions & fit | |
| Item Weight | 18 pounds |
| Item Display Weight | 18 pounds |
| Capacity & performance | |
| Capacity | 18 pounds |
| Construction & materials | |
| Material Type | Mineral and Plant Derivatives |
| Included components | |
| Unit Count | 18 pounds |
| Included Components | Cat Litter |
| Other details | |
| Asin | B09F8CP448 |
| Upc | 033200975465 |
| Manufacturer | Church & Dwight - Pet |
| Best Sellers Rank | #622 in Pet Supplies (See Top 100 in Pet Supplies) #38 in Cat Litter |
| Scent Name | Unscented |
| Item Form | Granule |
| Model Number | 033200975465 |
| Manufacturer Part Number | 10033200975462 |
| Customer Reviews | {'ratings_count': '6,961', 'stars': '4.3'} |
| Target Species | Cat |
| Item Type Name | Cat Litter |
Other ARM cat litter
How it compares
This product against the closest alternatives we track in cat litter.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| ARM & Hammer Ultra Last Clumping Cat Litter Unscented MultiCat 18 Lbs. Pet Friendly with…This product | 4.3 / 5 | 6,900 | 4.4 / 5 |
| Fresh Step Advanced Extreme Clump Multi Cat Clumping Litter with Febreze FreshnessFresh | 4.7 / 5 | 20,600 | 4.6 / 5 |
| PetSafe ScoopFree 4.3 lb BagsPetSafe | 4.5 / 5 | 45,300 | 4.5 / 5 |
| Cat's Pride Premium Lightweight Clumping Litter: Pure & FreshCat's | 4.5 / 5 | 18,600 | 4.5 / 5 |
| Purina Tidy Cats LightWeight With Glade Clear Springs Multi-CatPurina | 4.5 / 5 | 15,400 | 4.5 / 5 |
Similar cat litter from other brands
Questions about the ARM 033200975465
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Is this litter scented?
No, it's an unscented formula.
What handles the odor control if there's no fragrance?
Baking soda mixed into the mineral and plant-derivative litter.
Is it rated for more than one cat?
Yes, it's labeled as a multi-cat formula.