Hi guys, can anyone advice me on how to remove these stains from my bathroom floors?





I am not certain what caused this stain but my guess could be untidiness of developer's contractor doing the plaster ceiling.

I check with my own contractor, he adviced me to use a metal brush to remove it. Initially was thinking of pouring acid to remove the stains but he advice me agaisnt it, as acid will damage the cement.

Hoping to get more advice from all sifus here.

Thx in advance!

This post has been edited by iv'N: May 6 2011, 08:13 PM

Yeah will definately try that.

Just wanted to get more info from the community. May have other effective way right? Never know

What happen if use acid??

Usually this kind of pebble floor, is there any waterproof coating on top?

I was just testing out puting thinner on small patch and when washed away there is a new stain like the old plus there is some sticky stuff emerge up (could be waterproof selant originally applied?).. I'm thinking now the stains are not from plaster but from acid or thinner.

If the floors are wet, the stains are pretty much covered up.. I am wondering if there is any sealant I can use that make it wet look when it's dry. Can epoxy resin work?

This post has been edited by iv'N: May 8 2011, 04:33 PM