Quote Originally Posted by travajante View Post
That's fine if you don't need to store anything that should be kept dry under. Though they look to seek no upkeep, the sublayer concrete is hygroscopic & requires thorough watertightening/sealing(periodic)....Molds & roaches love the dark & damp spaces below those tiled counters.

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Bai is there a sealant preferably in a spray can that I can use to seal this concrete? Our sink is sandwiched between a concrete slab and granite top and there seems to be a gap that lets water through from the edges.

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