Due to your criteria that the tile couldn't be removed. So we have less alternative.
If we concern about water ingress into concrete that make the reinforce bar corrode we shold stop the ingress of water.
PU foam injection will be the best alternative in my openion but this must be performed by...
Dear Jyotimoy
Pls. Clarify your application. So I can recommend you the proper system that'll be suit your requirement.
regards,
Thawatchai Kongsaktragoo.
