TL;DR: Arm & Hammer Clump & Seal Multi-Cat Cat Litter is a 20 lb clumping clay litter made for cat owners with two or more cats sharing litter boxes. It seals in odours on contact using Arm & Hammer baking soda and moisture-activated micro-granules, for up to 7 days of freshness.

Multi-cat boxes work harder, and this clump and seal cat litter is formulated for that load. It forms rock-hard clumps so waste lifts out cleanly without crumbling, and the 100% dust-free, low-tracking design helps keep the floor around the box tidy.

Key features

• Formulated for multi-cat households
• Seals and destroys odours on contact with Arm & Hammer baking soda
• Up to 7 days of continuous odour control
• Rock-hard clumps for fast, clean scooping
• 100% dust-free formula
• Low-tracking design
• Suitable for cats of all ages and breeds
• 20 lb bag — a practical size for ongoing multi-cat use

Specifications

Who is it for?

This litter is designed for homes with two or more cats, where odour and scooping frequency are the biggest pain points. It suits cats of all ages and breeds.

It's also a sensible pick if you want a familiar clay clumping texture that most cats accept without fuss, and a low-tracking formula if your box sits in a high-traffic room.

How does the clump and seal litter control odour?

The formula pairs Arm & Hammer baking soda with moisture-activated micro-granules. When urine hits the litter, the granules activate and the baking soda neutralizes odours as the clump forms, helping keep the box fresher between full changes.

Feeding & use

Fill a clean litter box with about 3–4 inches (7–10 cm) of litter. Scoop clumps and solid waste daily, top up as needed, and empty and wash the box on a regular schedule — more often in multi-cat homes.

If your cat is sensitive to change, transition gradually by mixing the litter clump and seal formula with your current litter over several days. Maintaining the full 3–4 inch depth matters: shallow litter makes clumps break apart when you scoop.

What else should I consider?

In a busy multi-cat home, the general guideline is one litter box per cat plus one extra, placed in quiet, separate locations. This reduces competition at the box and spreads the odour load across more litter.

If you're comparing options, you may also like the Arm & Hammer - Slide Multi-Cat Cat Litter for easier box cleaning, the Intersand - Simple Clumping Cat Litter for a straightforward clay clumping litter, or the Naturally Fresh - Multi-Cat Clumping Cat Litter if you'd prefer a plant-based alternative.

Available for same-day pickup at our North York, Toronto storefront, or ships Canada-wide.