Howdy-I have a house in Mexico with a concrete roof which had a concrete floor poured on top of it in 4 separate pours and when it rains i get some water infiltration I have sealed the floor with an acrylic sealer but am wondering what would be good for the cold joints…I am thinking of Gluvit, a marine epoxy filler that is very liquid and can penetrate to fill pinholes…any other reccomendations???
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Check out Sika http://www.sikausa.com/ I'd think you'd need something with some flexibilty in addition to waterproof qualities. They'll have something to fill the bill.