I have fountain within house. Its floor and wall is covered using Glass Mosaic tiles...its pasted using MYK lacterite 325. Now what kind of water proofing I need to apply on top of the same? Please let me know whether epoxy is better or any other option available for the same.

There is central structure which is mix of concrete & brick ....it is in the middle of the fountain. Please let me know if I need to put epoxy or any other waterproofing paint.