black grout stain on polished porcelain

[Oscarflash]

Hi I've just laid 26m2 of wood effect polished porcelain tiles (quite high end from Italy. Fioronese urban wood)
After laying them I cleaned then with ltp grimex to remove factory wax, then sealed using ltp sealer impregnator left for 20 mins then buffed them up. I left them for 24 hrs to cure then grouted in black (nightmare I know) then I washed them off then polished only to find that the grout had stained the tiles.

My question is is there a realistic way of removing these stains. My feeling is no but if anyone out there can advise I would greatly appreciate it.
I just can't see where I went wrong. I'm totally gutted.

 

[Lithofin BOB]

I would start off with a porcelain specific cement residue remover, testvonly 1-2 tiles in a descreet area. dilute 1-3 or as stated, pre wet your joints, ( you don't want to burn your black grout joints grey) flash clean 1-2 min with brush or white pad. Rinse , dry , re test a stronger dilution if req.

What make of grout is it.?

Did they advise to remove the wax first? This could have protected you

 

[Bill]

I can't see much staining from that photo. Do you have a close up?

And just for the nerds...what grout did you use?

 

[Lithofin BOB]

I timed that badly Tom !!!!! I must be a nerd

 

[Andy Allen]

Personally I would of adviced against using black grout with polished porcelain.

 

[Oscarflash]

I used mapai black grout

 

[Oscarflash]

 

[Oscarflash]

Also I noticed even pencil marks caused stains on the tiles during installation so I don't think the factory wax would of helped against this

 

[Oscarflash]

If you've successfully used a product in a similar situation could you name the brand. Thank you

 

[McLovin]

Shot in the dark but I had some cheap ceramic white tiles stain when I used Bal Ash grout. The staining was on every tile and no cleaning product could sort it. Bal Technical had no idea. I crapped my pants if I am honest as i would have had to pay for them to be replaced.

The only thing that worked an absolute treat were Flash Magic Sponges. Saved my bacon. Had to raid the local asda but they were well worth it.
I always keep a few boxes in the van just incase.

 

[Oscarflash]

Thanks I'll give it a go

 

[McLovin]

Thanks I'll give it a go

Let us know buddy.Good luck.

 

[Tile seller]

You could try LTP Grout stain remover.
I presume u sealed with LTP MPG?
Floor looks nice in the photo.

 

[Oscarflash]

yes I did

 

[Bathfix Bob]

You must have been desperate to go searching in Asda you would have thought the pro chemicals would have sorted it first.

 

[Bill]

View attachment 86281

Can you point out what the staining is... or take a photo of an unfixed tile for comparison, please?

I can't make out the staining, in the last photo.

 

[Oscarflash]

The black spots

 

[McLovin]

You must have been desperate to go searching in Asda you would have thought the pro chemicals would have sorted it first.

Desperate is not the word. The retailer the customer and I had chosen the tiles from sent a team down the next morning trying to sort it with everything they had. In fairness to them the Flash sponges were their idea. I wound never have thought of it.
Credit where credit is due.

 

[Oscarflash]

Mclovin when you said about those magic sponges I thought no way that won't work........well **** ME IT DID
what a great doge Thank you. The only thing now I'm going to need about 150 of these. It'll properly take me a day or so but the job will be right thank you once again

 

[McLovin]

Mclovin when you said about those magic sponges I thought no way that won't work........well **** ME IT DID
what a great doge Thank you. The only thing now I'm going to need about 150 of these. It'll properly take me a day or so but the job will be right thank you once again

No probs pal. I never thought they would work when they were suggested to me. I don't know whats in those sponges but god are they good.

Glad I could help you out. Good luck with getting it all sorted but at least there is an end to it now.