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MarkR in the
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I have a problem with grout staining on some slate tiles which have been laid around a swimming pool. The tiles were sealed, this has been removed and we have ... -
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MarkR
I have a problem with grout staining on some slate tiles which have been laid around a swimming pool. The tiles were sealed, this has been removed and we have tried to remove the grout stains with a acid wash.
Does anybody no of a stronger product which might do the trick.
Thanks
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Re: MarkR
Hi mark.
Don't use acid on stone unless you know what you are doing, You will now need to neutralize the acid or it will continue to etch into the slate and over time will turn it into slurry. To do this get yourself a big box of bi-carb soda and mix a coulpe of handfuls in 10lt of water and rinse this over the stone liberally and allow to stand for 10 min then hose of with clean water.
You are better off using an alkaline cleaner on stone if you aren't experienced, pool chlorine would work well. Dilute 50/50 with water and whilst wearing gloves scrub the tiles and grout, then wash with clean water.
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Re: MarkR
what type of slate is it?
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Re: MarkR
Thanks for the replies, I think the slate is called Basalt with a flame finish and was supplied by Stonell.
It is very hard, we have washed the acid off. The acid we used was called spring clean, it seemed to have little or no effect.
Thanks for the help.
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Re: MarkR
Basalt stone can be re-traced to volcanic origins, so it is categorized as a lavatic stone. Its unique structure and its remarkable uniformity are a result of the gases that escape during the cooling process. It really really hates acid of any kind.
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The Following User Says Thank You to MICK the Tiler For This Useful Post:
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Re: MarkR
Thanks for the help, we'll try the chlorine and see what happens.I can get hold of liquid chloine(sodium hyphochlorite) would this be ok.
Once again thanks for the help.
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TilingLogistics
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Unregistered
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Re: MarkR
The stone is called Stonell Basalt, I will try and get some pics done once the rain stops.
Thanks
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