Efflorescence or Sealant problem on Indian Sandstone

[adam72]

I have applied the grout cleaner...it does look like any improvement so far.

 

[adam72]

Well its looking worse after applying the grout cleaner, more of a milky film over the slab rather than the white marks and spots.

 

[adam72]

Great I can add some images if anyone can advise that would be great



Before



After

 

[mike1979]

Try some xylene or thinners xylene is used on patteren imprinted concrete to take away white patches in situations where sealer has been applied to a slightly damp area or if it rained after sealing it might be moisture trust me give it a try xylene is what really is needed you can get it on the web but try some thinners brush it quite hard and use a healthy amount it melts and heats the sealer a bit give it a go

 

[adam72]

OK Mike cheers, do I apply this neat? do I just apply and let is soak in or wash it off after so many minutes? Cheers

 

[mike1979]

Yes do it neat if it's acrylic sealer you used this should work don't wash it down it needs 24 hrs of dry weather on it otherwise it will go white

 

[White Room]

Try some xylene or thinners xylene is used on patteren imprinted concrete to take away white patches in situations where sealer has been applied to a slightly damp area or if it rained after sealing it might be moisture trust me give it a try xylene is what really is needed you can get it on the web but try some thinners brush it quite hard and use a healthy amount it melts and heats the sealer a bit give it a go

Used plenty of that when doing printed concrete....

 

[Time's Ran Out]

Reading from the original post you left it 2 months before you sealed it!

 

[adam72]

Yes I was concerned as there seems to be two camps seal straight away or leave a couple of months and then seal to allow for any efflorescence. In fact that slab has now gone back to the first picture so less milky and just patchy gain after some rain.


I now I have another LTP product sent tome to try power stripper to remove the sealant.

 

[adam72]

So far not so good the ltp products haven't worked