Mapei Grout Scratches

[spooner68]

Has anybody out there had an issue with Mapei Ultrcolour Plus Grout scratching the surface of ceramic tiles?

Just fixed a small area of high gloss black ceramics and grouted as usual using Mapei Anthracite grout. When I polished of the minimal residue almost all of the tiles had fine surface scratches, only really visible when the lights directly above them were turned on. I checked each tile before fixing and they were fine so it is obviously the grouting that has done it. I have fixed loads of the same tile but this is the first time I've used Anthracite grout on them, on floors yes but a first on walls and on gloss black.

Anyone had the same?

Anyone any possible remedies apart from taking them all off and starting again but with a different grout?

Spooner

 

[DHTiling]

On sensitive surfaces try using kera colour FF.

 

[spooner68]

Before today I wouldn't have considered it sensitive but now..... we live and learn.

 

[DHTiling]

All high gloss tiles are a delicate surface IMO

 

[hillhead]

Cement based can scratch.
I'm sick of marble coming out of crates already scratched.

 

[spooner68]

First time (and last) that I've used that type of grout with glossy tiles, the client got it along with the tiles. Like I said, I've not had a problem with any other grout like this. Not the end of the world, a couple of hours to knock them off and start again. Nice coffee and cake makes it worth a revisit.

 

[user123]

On sensitive surfaces try using kera colour FF.

Hm, interesting, does that mean it's a finer grout than ultracolour then? Could be interesting for me ... does it come in the same colour range? Just googled it and it mentions fugolastic - have you ever used that, does that make it creamier still?

 

[DHTiling]

Hm, interesting, does that mean it's a finer grout than ultracolour then? Could be interesting for me ... does it come in the same colour range? Just googled it and it mentions fugolastic - have you ever used that, does that make it creamier still?

Wide joint grouts are a coarse grain of sand.. so yes the finer the grout the better for glass or polished surfaces.. FF will go to a 6mm joint.

And same colour pallet as Ultra colour

 

[user123]

I must admit I've been using a different Ultra brand lately, supplies of anything are very limited in Scarborough, but will look into that one, thanks.. 🙂 what about the fugolastic, is that the kind of effect as SBR Bond?

 

[Spud]

you need to remember to use a brand new clean grout float too, I have seen metal trim scratched where old groat floats were used