Revisions log for Answer #862

Alternatively, liquid two-component PU glue. It will glue everything together, the layer is minimal, but I'm not sure it will last long.

Another option is liquid nails, but the layer will be thicker, they eventually harden and lose their properties, not the best solution for tiles.

I tend to think you'll have to remove the tiles anyway – it's unlikely you'll be able to pump the adhesive under the tiles properly, and even if you can, the pressure you use to pump will cause the tiles themselves to pop up.