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Unread 03-27-2021, 10:51 AM   #4
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Join Date: Feb 2016
Location: Boston Area
Posts: 132
Originally Posted by Bill
Some people say sealing marble is a bad idea because it prevents any moisture that gets behind the tile from escaping
I'm no expert but I have been reading about sealers... It depends on the type of sealer. That is definitely true for a topical sealer - which should not be used on floors anyway.

A penetrating sealer that lets the stone breathe will slow down/minimize staining (but will not affect etching) and I think still allow evaporation .

The way I think it is, is that water vapor can still pass through (though perhaps more slowly) whereas liquid penetration is much more retarded. That way water can still evaporate if it gets underneath...

If I'm wrong about that maybe someone from latecrete (it makes a penetrating sealer) will chime in.

KarenA01 is offline   Reply With Quote