QUOTE(mick84 @ Apr 12 2021, 10:15 AM)
i need to do water proofing for my toilet.
Would want to gather some idea how can I DIY it and estimate a budget.
Water proofing expert welcome to give some advise. terima kasih.

Two methods as other have said,
1st menthod well documented here; is to paint epoxy on the floor/walls
2nd is hacking. We found out our toilets in 2nd floor were leaking. Went with hacking. Cost like 3k+
Had to drive to Melaka for the tiles as the old ones were shattered in the process.
We did this because we really dislike the look/feel of epoxy especially in the bathroom. Feels like a hospital and kinda too slippery. The tiles we choose have a rough surface.
No budget, go diy. But there's probably clear epoxy if you want to preserve the look of your old tiles, just the surface will be different though