Reviving Dark Grey Floor Grout

[malctoy]

Hi Guys

Just has my bathroom walls re-tiled and it looks great. Tiled floor remained as the floor tiles were perfect apart from the grouting in parts.

The grout on the floor tiles is dark grey, but where the 'Missus' has used talc, the grouting has gone lighter in colour. In spite of scrubbing, they dry this lighter/whiter colour and looks odd against the other dark grey grout.

The grout used was specially for floors and is solid as a rock so not easy to remove and re-grout. I have looked at the Unibond Grout Reviver but that seems to be a 'light' grey and all the other brands I found are white.

Anyone got any suggestions on how to bring back original colour or at least to make these lighter grouted areas darker ?

Thanks in advance.

[AAJ Tiling]

today there are grout stains and colorants that can be applied to old grout to change or enhance the color. A coat or two of these stains can completely change the look of your tile installation. You can also use them to cover stains and spots. Some good brands are Mapei, Ameritech, Aqua-Mix and Customs. Staining and colorant procedures vary from product to product, so be sure to follow the instructions.

If scrubbing is not effective, there are specialised cleaners that chemically attack grout. Many of these products are acid-based and should be used carefully. Always read the manufacturer's recommendations and follow the instructions to the letter. Also, avoid cleaners containing harsh abrasives that may damage tile surfaces. And always test the product on an inconspicuous area of the floor.

Steam cleaning technology is a new trend in grout restoration. Steam-cleaning machines convert ordinary tap water into a low-moisture, extremely high-temperature water vapor under low pressure to remove soil, grease and built-up filth from most home surfaces.