Any epoxy can be thinned and injected. When I did mine I used polyurethane adhesive because it reacts with moisture. If damp or wey epoxy does not stick well. I removed the windows to get the glue in. If you do a search under Gjac you can see the detail of the project. For a 1 ft square area that is delaminated and not by a widow or other panel or seam. It is probably not from water intrusion. If you can describe where it is located it would be easier to give you help. but if it in the middle of the laminated wall I would try the drilling several hole and injecting it with the epoxy or polyurethane and use a car jack next to a building or tree and a 2 ft piece of 3/4 ply wood to apply pressure after the resin is injected.