The three main types of UK cat litter

Walk into any UK pet shop and you face the same wall of cat litter you have always faced. Before the comparison, a quick overview of what you are actually choosing between.

Clay litter is the most common type in the UK — sold in every supermarket and pet shop. Made from bentonite (clumping) or fuller's earth (non-clumping). Cheap and familiar, but strip-mined and non-biodegradable.

Silica crystal litter is made from silica gel beads. Highly absorbent, long-lasting, low-maintenance. More expensive, mined from quartz, also non-biodegradable.

Tofu litter is made from compressed soybean pulp — the natural byproduct of tofu production. Plant-based, biodegradable, dust-free. Newer to the UK market but growing fast among cat owners who care about what their cats breathe.

For a deeper introduction to tofu cat litter, read our guide: What Is Tofu Cat Litter?

Dust levels

Clay litter — especially clumping bentonite — releases fine crystalline silica dust every time your cat covers. Long-term exposure has been linked to respiratory issues in cats and humans. Silica crystals produce less dust but fine grades can still be inhaled.

Tofu litter produces virtually no dust. None of the fine particles. None of the clouds when poured.

If your cat sneezes after using their litter box, dust is almost always why.

Verdict: Tofu, by a wide margin.

Odour control

Clay relies on absorption plus synthetic fragrance — masking odour rather than neutralising it. Many cats actively dislike the perfume, which can lead to litter box avoidance.

Silica traps moisture and slows bacterial growth — effective but not eternal.

Tofu controls odour through natural plant-based absorption — no synthetic fragrance, no chemical interference, no overwhelmed cats.

Verdict: Tofu, on cleanest method. Silica close on raw effectiveness.

Texture and paw comfort

Clay is granular and gritty. Silica is hard crystals — many cats find it uncomfortable, particularly kittens and senior cats. Tofu pellets are noticeably softer than both.

This matters most for kittens, senior cats with arthritis, and cats recovering from paw injuries. Some cats simply refuse silica because it hurts their paws.

Verdict: Tofu.

Environmental impact

This is where the comparison becomes one-sided.

• Clay is strip-mined bentonite — non-renewable, environmentally destructive at source, takes centuries to break down in landfill.
• Silica is mined quartz sand — also non-renewable, manufactured into beads, landfilled forever.
• Tofu is made from a food production byproduct that would otherwise be wasted. It is a circular product. Biodegrades naturally in weeks.

If environmental impact matters to you, there is no contest.

Verdict: Tofu, by a massive margin.

Disposal options

Clay and silica go straight to landfill. That is the only option, every week, for the lifetime of your cat.

Tofu can be binned, composted in a dedicated garden compost bin (never with food crops), or flushed in small quantities where local water authority guidance permits.

Verdict: Tofu — flexibility is a real practical advantage.

Cost per week

Budget clay is cheapest upfront. Tofu and silica are comparable on cost per week. When you factor in health, environmental and disposal benefits, tofu offers the strongest overall value — even if not the lowest sticker price.

• Clay (budget): £3–£5 (5L), lasts 2–3 weeks, around £1.50–£2.00 per week
• Clay (premium): £6–£9 (5L), lasts 3–4 weeks, around £2.00–£2.50 per week
• Silica: £8–£14 (5L), lasts 4–6 weeks, around £2.00–£2.50 per week
• Tofu: 5kg pack, lasts 4–6 weeks, comparable per week

Verdict: Tofu and silica, comparable.

Cat acceptance

Most cats accept clay immediately — it is familiar. Some cats reject silica because of the hard crystal texture. Cats generally accept tofu well, especially kittens. Adult cats switching from clay may need a gradual seven-day transition.

Verdict: Clay short-term. Tofu catches up quickly with proper transition.

The verdict

Tofu wins five categories outright, ties on a sixth, and only loses on short-term familiarity — which is a transition problem, not a product superiority problem.

This is not about being trendy. It is about a category that has not been seriously rethought in sixty years finally being rethought.

How to switch your cat to tofu litter

The seven-day method works for most cats.

• Days 1–2: 80% old, 20% tofu
• Days 3–4: 60% old, 40% tofu
• Days 5–6: 30% old, 70% tofu
• Day 7+: 100% tofu

Kittens typically switch immediately. Senior cats may need ten to fourteen days.

For full safety information — including for kittens, multi-pet households and pregnancy — read our companion guide: Is Tofu Cat Litter Safe?

What to look for when buying tofu litter

Not all tofu litter is the same. Look for these six things when buying any tofu cat litter:

• Three plant-based ingredients only — soy fibre, corn starch, guar gum. Anything more is unnecessary.
• HACCP and ISO manufacturing certification — proves the production facility is held to food-grade safety and quality standards.
• Plastic-free packaging — FSC-certified outer with home-compostable inner bag (look for OK Compost HOME or TÜV Austria).
• No synthetic fragrance — natural odour neutralisation only.
• Full ingredient disclosure on the product page.
• A satisfaction guarantee — fussy cats happen, the brand should stand behind their product.