Marble and travertine floors — do they really need sealing, and how do I keep them looking good?

Short answer: yes — natural stone like marble and travertine is POROUS and reactive, so it genuinely needs SEALING (periodically, not once) and gentle, stone-safe care, which is exactly why it stains and etches where dense porcelain shrugs everything off. Sealing slows liquids soaking in (so spills don't stain as fast), but it does NOT make stone bulletproof: marble and travertine also ETCH — dull marks from anything acidic (lemon, vinegar, wine, many "normal" cleaners) chemically eat the polished surface, and sealer won't stop that. The routine is: seal on a sensible schedule, clean only with pH-neutral stone cleaner (never acidic or generic bathroom products), wipe spills fast, and have it professionally cleaned/re-polished when it dulls.

Why stone behaves differently from porcelain: - It's porous: marble/travertine absorb liquids, so a spill left on it soaks in and stains. Porcelain (near-zero absorption) doesn't. Travertine also has natural pits/holes (often filled) that trap dirt. - It's reactive (etching): marble and travertine are calcium-based, so acids etch them — lemon, vinegar, wine, tomato, and many everyday/"limescale" cleaners leave dull marks by chemically corroding the surface. This is different from staining and sealer doesn't prevent it.

The maintenance routine: - Seal it periodically: a penetrating stone sealer slows absorption (helps against staining). How often depends on the stone, traffic and the sealer — high-traffic areas need it more often. A simple water-drop test (does water bead or soak in?) tells you when it's due. - Clean stone-safe only: pH-neutral stone cleaner and a soft mop. Never acidic cleaners, vinegar, bleach or generic bathroom/limescale products — they etch and dull it. - Wipe spills immediately (especially anything acidic or coloured). - Protect high-wear/wet zones and use mats at entrances (grit scratches polished stone). - Professional re-hone/re-polish when it's dull or etched — stone can be restored, unlike a ruined tile.

Common mistake: cleaning marble/travertine with the same acidic or generic products you'd use on porcelain or a bathroom — that's what dulls and etches an expensive floor. Treat stone as stone: neutral cleaner, periodic sealing, fast spill wiping. For sealing or restoring a dulled floor, a tile and natural-stone specialist can seal, hone and re-polish it. Anyone etched a marble floor with the wrong cleaner — did polishing bring it back?