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In my backyard there's a tile-paved area and there's a line where it goes from one level to another level:

https://imgur.com/a/ZYN5Xfy

The problem is, a lot of tiles on that edge are not held in place securely anymore.

On the image above, you can see a layer of old concrete, about 1" thick. I would like to not remove it (to save a lot of time). I want to use a thin layer of some special stone/brick/concrete "glue" instead of concrete/mortar to put the tiles back on it. I don't want to use concrete/mortar, because it will require a thicker layer and my tiles will become higher than the adjacent tiles.

I'm in the US, can you please help me choose the right "glue"?

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Looks like you have some kind of paver patio. Not clear if it's all on concrete base or aggregate, but the "step" at least appears to have a hard setting material. Anything you put there without removing the existing mortar will add at least a little bit of height to the step. You could try a paver adhesive, with the understanding that you may have to come back at a later date and chip out the existing mortar to use a more traditional method.

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  • Thank you @Huesman. The patio is not on concrete base, but the step is on stones. I started removing 2-3 mm for a paver adhesive with a belt sander & angle grinder, but it was so taking so much time and belts/disks, that I decided to try to my hammer drill to remove the old concrete. In 10 minutes I removed all of it :) So I will go on with good old concrete now :)
    – nightcoder
    Commented May 21 at 13:21
  • I hope you're going to use mortar and not concrete!
    – Huesmann
    Commented May 22 at 11:34
  • hi, a HomeDepot worker recommended me this: homedepot.com/p/SAKRETE-60-lb-Sand-Mix-65306217/100350697 Is it fine?
    – nightcoder
    Commented May 25 at 1:32

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