How do you clean and seal a stone bathtub?
Last updated October 2026.
Quick answer
- Everyday cleaning
- pH-neutral stone cleaner or mild soap, soft cloth, rinse
- After each bath
- rinse and wipe or squeegee dry to limit soap scum and water marks
- Never use
- vinegar, lemon, bleach-based or acidic bathroom cleaners, scouring powder
- Sealing
- makes stone stain resistant, not stain proof; reseal about yearly
- Etch marks
- re-honed or polished out by a stone restorer
Clean a marble, travertine or onyx bathtub with a pH-neutral stone cleaner or mild soap and a soft cloth, rinse, and wipe it dry after each bath. Never use vinegar, citrus or other acidic cleaners, or scouring powder: they etch or scratch the stone. Seal it with a penetrating stone sealer and reseal about once a year.
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How do you clean a stone bathtub day to day?
- After each bath, rinse the tub with clean water.
- Wipe it dry with a soft towel or squeegee, especially in hard-water areas.
- Once a week, wash it with a pH-neutral stone cleaner (or a few drops of mild soap in warm water) on a soft cloth, then rinse and dry.
That is all most stone tubs need. The rest of this guide is what to avoid and how to keep the seal working.
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What can you use on a stone bathtub, and what should you avoid?
| Job | Use | Avoid |
|---|---|---|
| Everyday clean | pH-neutral stone cleaner or a few drops of mild dish soap in warm water | General bathroom sprays, bleach-based or 'limescale' cleaners |
| Soap scum | Squeegee or towel-dry after each bath; stone-safe scum remover | Vinegar, citrus or acidic scum removers |
| Hard water marks | Wipe dry; a stone-safe cleaner on a soft cloth | Descalers, which are acids |
| Scrubbing | Soft cloth, sponge or soft brush | Scouring powder or cream, steel wool, green scouring pads |
| Bath products | Rinse bath oils, salts and bath bombs out after use | Leaving colored or acidic products standing on the stone |
What should you not use on a marble bathtub?
Anything acidic or abrasive: vinegar, lemon, citrus or 'limescale' bathroom sprays, most tub-and-tile and toilet cleaners, scouring powders and creams, and rust removers. Marble, travertine and onyx are calcite, which acids dissolve, leaving dull etch marks.
How often should a stone bathtub be sealed?
Most stone tubs are sealed before delivery. Reseal about once a year with a penetrating (impregnating) sealer, or sooner if water stops beading on the surface. Sealing slows staining; it does not stop acids from etching.
To test it, drip a little water on the stone. If it beads, the seal is working; if it darkens the stone within a few minutes, it is time to reseal. Apply the sealer to clean, fully dry stone, following the maker's instructions, and let it cure before filling the tub.
How do you remove soap scum from a stone bathtub?
Prevent it by rinsing and wiping or squeegeeing after each bath. To remove a build-up, use a soap scum remover made for natural stone; avoid generic scum removers, which are often acidic.
Can etch marks on a marble tub be fixed?
Yes. Light etching on a honed finish can often be buffed out with a marble polishing compound; deeper marks or a polished finish are best re-honed and re-polished by a stone restoration specialist. Solid stone can be refinished many times.
Is onyx or travertine harder to care for than marble?
All three are calcite, so the rules are the same. Onyx is the most delicate: softer and more brittle, so be gentle with heavy objects on the rim. Unfilled travertine has natural pores that can trap soap; most travertine tubs are filled and honed, which makes them as easy to keep as marble. See travertine vs marble and onyx bathtubs.