N
nell
We have laid a black & White chequered porcelain tile floor, the tiles are HITOM (Chinese, but purchased from a local quality tile supplier). The tiles were cleaned with "Wax off" and then sealed twice with FILA MP/90 Prior to grouting. A black grout was used but this "stained" the white tiles. We have tried a number of different chemicals and steam cleaner to clean them but grey steak marks remain.
So then the floor was pulled up and another set of HITOM tiles (from B&Q this time) were used but this time with a neutral grey grout. The tiles were cleaned with Wax off and then given 2 coats of Aqua Mix Ultra Solv. After grouting the black tiles were left with light coloured staining (although not as bad as the first lot of tiles). With a lot of effort (using nano scrub) this has been reduced to almost acceptable.
I have searched the web and found that porcelain porosity can be an issue but this should have been resolved by the sealers. I have a theory that the "pores" on the polished tiles are too large and granules of grout gets lodged in them, rather than the grout stain.
Has anyone seen the same issue?, Know why it is happening? has a solution?
Thanks.
So then the floor was pulled up and another set of HITOM tiles (from B&Q this time) were used but this time with a neutral grey grout. The tiles were cleaned with Wax off and then given 2 coats of Aqua Mix Ultra Solv. After grouting the black tiles were left with light coloured staining (although not as bad as the first lot of tiles). With a lot of effort (using nano scrub) this has been reduced to almost acceptable.
I have searched the web and found that porcelain porosity can be an issue but this should have been resolved by the sealers. I have a theory that the "pores" on the polished tiles are too large and granules of grout gets lodged in them, rather than the grout stain.
Has anyone seen the same issue?, Know why it is happening? has a solution?
Thanks.
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