I doubt that the windows can be resealed, if this is the seal between 2 panes of glass. The windows are typically filled with a special dry gas for insulating and moisture control. It is not practical to dry, and refill and reseal in the field. Since you state these are fogging, I believe you will need to have the entire panel(s) replaced.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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