Hi, We are contract cleaners and have a job which involves cleaning black porcelain floor tiles in a toilet area and then to possibly seal them. Suggestions on products to use please.
Further to Dougs post you have to question why they are stained now? Is it matt or polished riven or smooth? Because if urine has penetrated it will need to be thoroiughly cleaned and allowed to dry out completely before you apply any sealer
as mentioned above you need to find out what the tile is and what it was sealed with originally or you may end up with a bigger mess to try and clean :8: