Unless you have issues with the tiles sticking you probably only need to use the adhesive that already comes on the tile backing.
Can you use self adhesive floor tiles on walls.
Self adhesive floor tiles on walls may start to lose their hold over time due to gravity.
You can apply many self stick wall tiles over top of existing tile or an ordinary smooth wall surface such as painted.
The cheaper kind can break and fall off your walls which can lead to you having to replace the vinyl within a short amount of time.
Peel and stick vinyl tiling can be very cheap but it is best to avoid the really cheap kind.
Check the tile to see if it comes with.
It will also be suitable for your wall.
Wash the wall with a mixture of 1 part mild dish soap to 6 parts water.
It is simply not durable enough.
This is also why you do not want to do it the other way around.
As long as a tile no matter the size meets a set criteria it will be suitable for your floor.
Make sure that you pop a chalk line before laying your tiles so that your tiles are straight and look good in your room.