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Water mark

Asked by Fred Hancock from United Kingdom: The quarry tiles where in contact with water for several days and have a white stain that cannot be removed with normal cleaners or tile doctor sealant.

TileProf says: Hi Fred, The quarry tiles are either very old and dont have a Damp proof membrane fitted underneath them or the old sealer was not removed properly first and no amount of new sealer will hide this until it is cleaned properly, for more info click on the link below. Regards Russ

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