10.7 oz Scotch Super 77 Multi Purpose spray adhesive.
Creates a firm bond on drywall, plaster, concrete, foam and cardboard.
Spray each tile with an even coat. For temporary bond, spray just the tiles. For a permanent bond, spray both the tile and the wall surface. Let tile set for 30 seconds in place. A combination of spray adhesive and pins to help set tiles in place work well.