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I moved into a house with travertine floors. They appear to have been sealed and polished. I recently learned that travertine is highly porous. I recently noticed this tile where the seal appears to have worn away and the stone is "powdering." (No idea if that's the correct term.) What do I use to repair and/or seal this?

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It also might not be a bad idea to re-apply a coat of sealer every few years. Check the bottle for exactly when to do this. If the shine ever fades from the floor rent a buffer and use a white polishing pad on it. It will shine just like new! –  ValueforValue Jul 16 '13 at 5:32
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1 Answer

up vote 2 down vote accepted

Travertine can have many impurities, and being a sedimentary rock, could have a nugget of softer material.

In any case, use a stiff nylon brush and remove the chalky area.

Rinse the area and note if water absorbs in the nugget area.. If so, good; grout and/or sealer will attach securely.

I would recommend a bit of matching grout in the divot, followed by a penetrating stone sealer.(I prefer Miracle products, but others are fine).

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This makes a beautiful floor but it does come with some maintenance. Your answer is spot on +1. –  ValueforValue Jul 16 '13 at 5:31
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