No extra preparation is needed on a smooth surface.
Can you put stick on tiles over ceramic tiles.
Start in the inside of the room and scoop out a bunch of the leveling compound and smooth it over the grout lines with a trowel or putty knife and.
I recommend henry patch n level which you can buy pre mixed.
The smooth ceramic tiles with small joints and grout lines are perfect for peel and stick smart tiles.
Over time the vinyl will sink or be pressed down into the contour of these depressions telescoping the grout joints from the ceramic tile installation all the way up through the vinyl tiles.
Don t overdo it because the excess oozes from the tile joints requiring you to stop frequently and wipe it off with a damp cloth.
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Tile on tile or as i say it.
With a good cleaning peel and stick smart tiles will stick on your kitchen or bathroom backsplash for as long as you want.
The tiles can also slide if the mastic is too thick.
And it lasts for 20 years.