Has anyone had experience with chemical grouting for under slab moisture sealing?

Moisture in a 17 year old slab on grade construction has ruined my engineered wood floors (Used Mapei sealer warrantied up to 15 lbs.. turns out we have wet spots up to 17+ lbs, just not where the calcium chloride tests were done prior to installation.) The opinion of several experts who have inspected the property is that the moisture is coming up from clay soil through a ruptured under-slab vapor barrier via hydrostatic pressure.

One option is to pump chemical grout through small holes in the slab (on a 3ft grid) to achieve under slab sealing. Several companies in FL do this, but I have not been able to find much info about results.

Has anyone see this done, either in residential or commercial applications? Was it successful? Did the flooring have to be removed to allow the slab to dry once it was sealed? Any info on this procedure is appreciated!