Kashmir Gold-strange performance issues

please help, i dont understand (http://maplered.com) this one. we have a customer with Kashmir Gold tops. i have personally been to his house at least 12 times. he is constantly complaining of water stains (which is a legitimate complaint). i have sealed it many, many, MANY times. every time he calls, i go to his house to check it out. i test it every time with water...it beads just as well as the day i applied it. the problem occurs when he places a pot of water on his tops, and (http://maplered.com) leaves it sitting there for "an hour". i assume the pot is wet on the outside as well. it seems as though the water is being "pushed" into the Stone (http://g603.net) by the heavy pot sitting on the Stone (http://g603.net) . i have tried to re-create this situation at our shop, but have had no success in water penetrating the Stone (http://g603.net) . i have used both Porous Plus, and (http://maplered.com) MB-4. yes, i stripped, cleaned, nuetralized, and (http://maplered.com) everything else i could come up with. i dont understand (http://maplered.com) what is happening different at his house, than in our shop. all input is welcomed, and (http://maplered.com) much appreciated. thanks in advance.
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Doug Male, SFA
Phillipsburg Marble Co.
Phillipsburg, NJ 08865
908-859-3435
www.pburgMarble (http://www.lightemprador.com) .com