Arm & Hammer Clumping Cat Litter, Unscented Multi-Cat 18 lb — Baking Soda Odor Control, Low Dust

ARM & Hammer Ultra Last Unscented Clumping Cat Litter is a multi-cat, baking-soda–enhanced clumping litter designed to neutralize odors, form firm clumps, and minimize dust and tracking.

This unscented, online-exclusive 18 lb formula combines ARM & Hammer Baking Soda with odor eliminators to control smells between scoops while delivering reliable clumping performance. It’s formulated for households with more than one cat, offering a low-dust experience and compact packaging that’s easy to store or purchase in multiples for longer supply.

How does this litter handle multi-cat odor control?

The Ultra Last formula includes baking soda granules that chemically neutralize ammonia and other litter box odors rather than just masking them. That means fresher air for longer periods, which is especially useful if scooping can’t happen multiple times each day.

• Baking Soda granules to neutralize odors
• Odor eliminators designed for sustained freshness
• Unscented profile avoids added fragrances
• 18 lb size supports stocking up for multi-cat homes

Will it clump reliably and make scooping easier?

This litter forms firm clumps on contact with moisture, simplifying daily scooping and helping maintain a cleaner litter box base. Firm clumps reduce breakage and limit the amount of fresh litter that must be replaced with each scoop.

• Fast-forming clumps for efficient scooping
• Clumps break less, reducing waste
• Works with standard scoops and litter box liners

Is it dusty or likely to track around the home?

ARM & Hammer Ultra Last is formulated to be virtually dust free (claimed 99% dust free), helping keep air cleaner and reducing the layer of dust on floors and furniture. It’s also described as low-tracking, which minimizes the amount of litter cats carry outside the box.

• Virtually dust free for cleaner air quality
• Low-tracking granules to reduce scatter
• Good choice for cats and owners sensitive to dust

How should I store and buy the 18 lb online-exclusive bag?

The 18 lb bag is sized for easier handling and storage compared with very large sacks, and it's convenient to purchase multiple bags online to maintain a steady supply. Store bags in a dry, cool place and reseal or transfer to a sealed bin to preserve performance between uses.

• Compact 18 lb bag for easier lifting and storage
• Buy multiples to extend time between purchases
• Keep in a cool, dry area or sealed container after opening

Who is this for? ARM & Hammer Ultra Last Unscented Clumping Cat Litter is aimed at multi-cat households and owners who want effective odor neutralization without added fragrances. It’s a solid option for people who prefer low-dust, low-tracking litter that forms dependable clumps and is sold in a manageable 18 lb bag for easier handling and stocking.