Limestone floor - colour issues around edges after grouting - TilersForums.com

[goz]

Hey guys, spoken to Harry about this and as usual is a great help wondered if anyone has any input on this? Artisans limestone floor , very porous, wanted to go with rapid all in one but they sent hydro seal instead, water based, so went with it, floor was cleaned and left for 24 hours, then sealed , left for 48 hours, I did a water test and it beaded up nicely, started grouting , did a 15m section and felt the grout was grabbing so washed off and stopped , now left with slightly darker stone around the outside , any advice to get this off ??

 

[J Sid]

Water ingress into the unsealed sides of the stone and trapped under the sealed surface. Doesn't look like a dark grout so should stain and should dry out slowly over time.
Hope that's what Harry said

 

[Tiler Durden]

I hope it is just water ingress and not staining

 

[goz]

I hope it is just water ingress and not staining

What if it is grout staining?

 

[Ajax123]

Dont go down the what if route.... it looks like moisture to me.

 

[Dumbo]

Could just be moisture . How long has it been left after grouting .

 

[goz]

Only yesterday ..... it does seem to follow where the grout float was

 

[Dumbo]

It would be interesting to no what the moisture levels are at the edge of the stone compared to middle .
What is the name of the stone .

 

[Tile Shop]

Hopefully its watermarking. Give it a few days to see if it starts to dry out. If it remains and appears unchanged, the grout has either penetrated the tiles or just ingrained in the micro-texture of the surface of the stone. Don't be tempted to try a regular grout stain remover. It will knacker it. LTP have one that is suitable for unpolished marble and limestone that you could give a go:

LTP Cement Grout & Salt Residue Remover

A rapid action cleaning agent for removing cement residues, grout stain, salts, efflorescence and other similar deposits. May also be used in dilute or concentrated form. Ideal for use on all types of unpolished natural stone can also be used on porcelain, glazed ceramic, slate, quarry tiles...

www.ltp-online.co.uk

 

[goz]

Artisans belvoir, the most porous things I have ever had the displeasure of even looking at!!!