1.Apply gel on Thin film of cement,  power to loosen the bond between the cement and the tile.
2.Sufficient time of reaction will loose bond of cement  completely.
3.Allow the gel to set on the cement for at least an hour or two.
4.For hot climate avoid evaporation, reapply frequently to keep the area moist.
5.After the cement starts to loosen, scrub the area with either a brush, Scotch Brite pad or scouring pad.
6.If a small amount remains, reapply GEL and allow it to set again.
7.Scrub again until all of the cement is removed.
8.Flush the area with water.
9.Neutralise and Wash the area with alkaline soap and water.