Marble has capillaries, so coffee, red wine and soy sauce left standing will soak in and leave a mark. Sealing lines those capillaries with a protective layer so liquid sits on the surface and can be wiped away. Done properly, it makes daily care of marble countertops and floors far easier.
Penetrating sealers line the capillary walls without changing appearance or breathability, and are the standard for stone. Film-forming sealers and coatings sit on the surface, adding gloss but altering touch and breathability, and must be ground off before reapplication. Homes and commercial projects generally use penetrating sealers.
Apply after installation and grouting, once the surface is clean and dry. Cement bedding must cure fully, usually 7 to 14 days, or trapped moisture causes water staining. Apply evenly, allow it to penetrate, wipe off excess, and repeat once or twice as the product instructs.
Low-traffic interiors every 12 to 24 months; kitchen countertops, bathrooms and dining areas every 6 to 12 months; malls and office lobbies under an annual maintenance contract. To test, drop water on the surface: if it is not absorbed within five minutes, protection is still effective.
One: sealing prevents scratching - it only reduces staining, not scratches or etching. Two: one application lasts forever - the layer wears with use. Three: sealing before the stone is dry - this traps moisture and causes water stains. Four: using the wrong product - granite and marble sealers can differ, so check suitability.
No. Sealing only reduces staining risk; scratches and acid etching still occur, so use chopping boards and avoid acidic cleaners.
Drop a little water on the surface. If the bead stays and is not absorbed within five minutes, protection is still working; if it darkens quickly, reseal soon.
Yes. Clean and dry the surface, apply penetrating sealer evenly, wipe off excess and repeat as directed. Large or high-traffic areas are better handled by professionals for an even result.