In ground concrete pool cracked

[j.raynor84]

Good morning.

First time poster. I hope you all can help.

I am a Pool service business owner in Argentina. I have a large leak that I detected in a in ground concrete pool. The leak is located in a corner between two tiles. All the repair solution that builders and supplier are suggesting is that a use a silicon sealant and I would like to solve the problem permanently. As well it seems that maybe the walls are separating an amount that I would estimate of about 2 or 3 mm.

My question is what would be the best solution to fix the leak? Would it make sense to use some angular rebar reinforcements on the pool surface?

Thank you in advance.

[Teapot]

Remove the tiles, cut in the trenches to inbed stainless steel rebars and fill with bentonite (waterplug mortar) NOT silicone.