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Unread 03-26-2020, 11:06 AM   #30
Metropolitan Ceramics
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Join Date: Apr 2019
Location: Canton, Ohio
Posts: 73
Sealants are beneficial for stones, tiles, and grout with high porosity. Marble, travertine, and limestone are the typical stones that benefit from sealing because the pores can trap dirt and stains. Pre-filling them with a clear sealer to keep them from staining or discoloring makes sense. The pebbles (typically made of dense stones like quartz or granite) and grout you have there are very low porosity so a sealer likely won't do much. If you do want to seal them, the Aquamix sealer you used before would be fine, it won't react negatively to the Flexcolor. There are those that feel sealing the stones doesn't let them 'breath' if moisture gets behind them but that also shouldn't be an issue for the pebbles I'm seeing in your picture.
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