grout not same colour

[Unregistered]

I have just laid a floor using bal grout grey. It has dried very patchy in colour any suggestions what when wrong?? Same bag used throughout.

 

[DHTiling]

Was it the standard grey or super flex..?

 

[Matt]

I have not used BAL grout but have had the same thing accur when I have used Mapei Ultracolour Plus. It is sometimes down to the grout not being mixed properly (It was in my case). I mixed up a batch of Grey to use on a display, looked fine until it dried and then it went like a zebra, very patchy

 

[DHTiling]

Some times Matt ,as you say it is just incorrect mixing of the pigments....not leaving the grout to slake then remixing...

Also over washing can bring polymers to the surface leaving lighter patching...

Even grouting to early before adhesive has set can cause efflorescence and patching...

But some grouts have had issues with this shading....i have had probs with the make above with the grey and limestone grouts others have had probs with the black...but no definate answer has been given why when i have spoke to a pst about it.


But other makes have the same issues..i personally think it's mainly down to the added polymers used to cope with timber installations.. i have used standard grouts and then a latex additive..no probs there but the hydrated simply add water ones , well they need care when working with them and instructions followed to the tee..

I have just laid a floor using bal grout grey. It has dried very patchy in colour any suggestions what when wrong?? Same bag used throughout.

Ring the companies tech line and they could send out a pst to have a look...but i'm more inclined it is user error in the mixing and washing off side of it..

 

[Matt]

But some grouts have had issues with this shading....i have had probs with the make above with the grey and limestone grouts others have had probs with the black...but no definate answer has been given why when i have spoke to a pst about it.


But other makes have the same issues..i personally think it's mainly down to the added polymers used to cope with timber installations.. i have used standard grouts and then a latex additive..no probs there but the hydrated simply add water ones , well they need care when working with them and instructions followed to the tee..

So is this normally more of a problem when it's a polymer modifeid flexi grout? I must admit, I have never heard of or had an issue with patching in standard grout

The problems you have had, has it been from the same bag?

 

[DHTiling]

Never had probs with an unmodified grout....it's always a modified one if i do get any..

But thats only happened a couple or so times..but when we hear of probs on here with patching 9/10 times it is a modified grout...

So my advice is..mixing thoroughly and do not over wash before it sets.

 

[enduro]

Just had this problem with some ultra grey grout, mixed it to instructions, cleaned it off as per every other grey grout i have used....and it has dried patchy, i laid the floor with grey addy and grouted two days later, the kitchen company supplied the grout, i checked the date on the bags and they are 15 months old.

 

[Unregistered]

Super flex grout.

 

[DHTiling]

Super flex grout.

You need to contact them direct and get the grout looked at...

 

[Olz]

I've had some probs with Granfix Maxi recently, I thought id mucked it up to be honest by mixing it wrong but the supplier said that hes had loads in with the same problem recently.