Stone · Care Guide
Slate
Fine-grained, cleaved and naturally textured
Maintained As
Porous Natural Stone
Cool to the touch, honed to a soft matte or polished to a reflective sheen. Honed hides etching far better than polished.
Durability
Everyday resilience
Very hard but chemically reactive. A lemon slice left for a minute leaves a dull mark that no cleaning will remove.
In the Collection
0 pieces
Every piece we carry in slate, cared for the same way.
About This Material
Slate is metamorphosed shale that splits along natural planes into thin sheets, giving it a characteristically rippled cleft surface. It is denser and considerably less absorbent than limestone or marble, and it is the least acid-sensitive of the natural stones here.
How To Spot It
Dark grey to charcoal, often with a rippled cleft face and visible layering at the edge.
Every slab is unique. Veining, pitting and colour variation are geological features, not flaws. Travertine's natural voids may be filled or left open.
Specific To Slate
More forgiving than marble, but still benefits from sealing. A little mineral oil or a dedicated slate enhancer revives the depth of colour on a dull cleft surface.
At A Glance
How it holds up
Each bar shows how well slate resists that stress — five means it shrugs it off, one means it is the first thing to damage the surface.
Typically Used For
What It Does Well
- Least acid-sensitive natural stone here
- Naturally rippled cleft face
- Excellent heat tolerance
What To Accept
- Can flake along cleavage planes
- Dark surface shows dust
- Colour dulls without an enhancer
Daily Care
The everyday routine
- Dust with a dry soft cloth.
- Blot spills the moment they happen — acidic ones such as wine, citrus, coffee and vinegar within seconds, not minutes.
- Coasters under every drink, without exception.
- Lift objects rather than sliding them, and keep a felt pad under anything with a hard base.
Deep Cleaning
Step by step
- 01 Dust off any grit, which scratches polished stone.
- 02 Clean with warm water and a stone-specific pH-neutral cleaner on a soft cloth.
- 03 Rinse with clean water on a fresh cloth to lift all cleaner residue.
- 04 Dry completely with a soft towel — air drying leaves mineral spotting.
- 05 Test the seal: drop a little water on the surface. If it darkens the stone within a few minutes, it needs resealing.
- 06 Reseal with an impregnating stone sealer, applied thinly and buffed off per the maker's timing.
Safe To Use
- pH-neutral cleaner formulated for natural stone
- Warm water and a soft cloth
- Impregnating (penetrating) stone sealer
- Poultice powder for drawing out deep stains
Never Use
- Vinegar, lemon and any acidic cleaner — these etch on contact
- Bleach and ammonia
- Bathroom limescale removers, which are acid by design
- Abrasive creams, powders and scouring pads
- Generic all-purpose sprays, most of which are mildly acidic
Stain Removal
Lift it without making it worse
Blot rather than rub, and test any treatment somewhere out of sight first.
Blot immediately. For anything remaining, use a poultice of baking soda and water: spread a centimetre thick, cover with cling film, tape the edges, leave 24 to 48 hours, then scrape off gently and rinse.
A poultice is the only effective route — oil sits in the pores. Use baking soda with a little acetone rather than water, cover, and leave 24 hours. Reseal afterwards.
This is not a stain. The acid has dissolved the surface and left a dull mark. Light etching on polished marble can be buffed with a marble polishing powder; anything deeper needs professional honing.
Poultice with baking soda and a little hydrogen peroxide on light stone, or acetone on dark stone. Always test somewhere hidden — peroxide can lighten dark stone.
Usually mineral deposit rather than a stain. Buff gently with a dry cloth; if it persists, use a stone-safe polishing powder.
Blot immediately and clean with neutral stone cleaner. Urine is acidic and will etch — speed is everything.
Rust is chemically bonded to the stone and will not poultice out. This needs a professional rust remover formulated for stone.
Prevent Damage
What actually causes the harm
- Acid
- The defining risk. Keep citrus, wine, vinegar and cleaning products with any acid off the stone entirely.
- Moisture
- Blot rather than wipe, so you are not spreading a spill into a wider area of open pore.
- Heat
- A coaster or mat under anything hot. Thermal shock can crack a slab, and a hot mug will mark a sealed surface.
- Scratches
- Felt pads under ceramics and metal objects. Never drag anything across the surface.
- UV
- Minimal risk to the stone itself, though some resin fillers in travertine yellow slightly in strong sun.
- Sealing
- Reseal on a schedule rather than waiting for a stain. Unsealed porous stone absorbs almost anything.
- Outdoor exposure
- Freeze-thaw cycles crack porous stone. Bring indoors before winter unless the piece is specified for outdoor use.
Never Do This
Damage that cleaning cannot undo
Each of these changes the surface permanently.
Vinegar
Acid dissolves calcium carbonate on contact. It leaves a permanent dull etch that cleaning cannot reverse.
Lemon or any citrus cleaner
Same reaction as vinegar, and just as permanent.
Bleach
Discolours the stone and degrades the sealer, leaving the surface far more absorbent than before.
Abrasive powders and scouring pads
They scratch honed stone and destroy a polished finish.
Leaving the stone unsealed
An unsealed porous slab will take a permanent stain from a single glass of red wine.
Generic bathroom cleaners
Almost all are acidic limescale removers, which is precisely the chemistry that ruins this stone.
Repair
Putting it right
Marble polishing powder worked with a damp cloth will restore a polished surface. Honed stone is more forgiving and often needs nothing.
Professional honing and re-polishing of the whole surface, so the sheen stays even.
A colour-matched stone epoxy, sanded flush once cured. Best done professionally on a visible edge.
Repeat poultice applications — two or three cycles are normal for an old oil stain. Reseal afterwards.
Structural. Have it assessed professionally; a crack across a span will propagate under load.
Maintenance Schedule
A rhythm worth keeping
- daily
- Blot spills instantly. Coasters under everything.
- weekly
- Clean with pH-neutral stone cleaner and dry fully.
- monthly
- Run the water-drop test to check the seal.
- quarterly
- Inspect edges and corners for chips.
- annually
- Reseal. A coffee table that sees daily drinks may need it twice a year.
Where To Put It
Indoor placement
Porous stone is heavy, cold and chemically reactive. Site it for support and keep acids away from it.
Site It Like This
- Check the floor can take the weight — a stone top plus its base is often over 60kg.
- Keep citrus, wine and vinegar off it; a coffee table sees more of all three than people expect.
- Position it where coasters will actually get used, not where drinks get put down absent-mindedly.
- Put a felt pad under a stone lamp base so it cannot scratch the surface it stands on.
- Reseal on schedule rather than waiting for the first stain.
Not Here
- Outdoor terraces in any climate with a freeze-thaw cycle — water in the pores cracks the stone.
- Setting anything hot straight down on it without a mat.
- A bathroom where limescale removers are in regular use.
- Under a hanging plant that gets watered in place.
Weekly Care
The five-minute routine
Clean with pH-neutral stone cleaner and dry fully.
Then monthlyRun the water-drop test to check the seal.
Common Questions
What owners ask us
Yes, diluted — and this is where slate differs sharply from the marble and travertine it sits beside. Slate is metamorphosed shale, not calcium carbonate, so acid does not etch it the way it destroys marble. A pH-neutral cleaner is still the everyday choice, but an acidic limescale remover will not ruin a slate top.
Repeated cleaning gradually strips the natural depth from a cleft face. A little mineral oil or a dedicated slate enhancer brings the colour back — it is not damage, just a finish that has worn thin.
Slate splits along natural cleavage planes, so occasional light flaking on a cleft face is inherent to the stone. Persistent flaking across a whole area is not, and is worth showing us.
Less urgently than marble or limestone — it is denser and considerably less absorbent. A seal still helps on a dining surface, but slate is forgiving if you are a few months late.
Slate has excellent heat tolerance, genuinely better than most stone here. A trivet is still sensible for thermal shock on a thin slab, but heat is not slate's weakness.
Yes. It handles weather well and is one of the few stones we sell that is genuinely happy outside, including through a freeze-thaw cycle.
Lifespan & Ageing
How it will look in ten years
With Proper Care
A lifetime. Natural stone outlasts the base it sits on and can be professionally refinished.
With Poor Care
Two to five years before accumulated etching and staining make the surface look tired and blotchy.
How It Ages
Marble and travertine develop a soft patina of fine etching that many owners come to prefer — it is why we specify honed finishes rather than polished ones. If you want a surface that stays pristine, this is the wrong material and sintered stone is the right one.
Slate Specifically
Very stable. May lighten slightly with repeated cleaning; an occasional enhancer restores the depth.
Related Materials
Cared for the same way
These share slate’s maintenance regime, so the same routine applies to all of them.
Not Sure
We will check it for you
If you are unsure which material your piece is, or you have a mark you would rather not experiment on, tell us the piece and what you are unsure of; when we reply, you can attach photographs.
Ask us