White Film

Hi, I live in AZ and have a full flagstone patio including right around my pool. The pieces directly next to my pool have begun to chip off and even seem to turn to sand when they get wet. I chipped off all of the loose pieces and used a penetrating sealer on the entire patio. I noticed this morning there seems to be a white film on parts of the patio? Will this go away over time? Any recommendations?

Thank you in advance,


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