Forum: Flags and Slabs
Topic: Sandstone patio
started by: Eds9332

Posted by Eds9332 on 22 July 2017,23:34
Hello,

How do you remove staining from polymeric sand? It has ruined my sandstone patio! It has left the pavers with a grey cement look stain.

I have tried vinegar and steam but no joy,

Any recommendations would be great

Posted by Tony McC on 23 July 2017,12:14
The chemicals used to remove staining caused by the resin component of typical polymeric mortars will also dissolve the binder holding together such mortars. If the staining is due to the oil component, then a good, safe detergent (such as Johnsons' Baby Shampoo) should help shift it.
Posted by Eds9332 on 23 July 2017,18:35
The stain has been on for a while, I have used a detergent with scrubbing but hasn't shifted it, the patio looks dull, however when wet looks good, maybe if I seal it with a wet look sealant might help?
Posted by MrT on 24 July 2017,10:11
Use vinegar and a bristle scrub brush. Seems to work as quite a good releasing agent.
Posted by Tony McC on 25 July 2017,11:27
If the staining is resin-based, a sealant (at least a good quality sealant) might not bond/absorb properly.
Posted by Eds9332 on 30 July 2017,11:06
This is what I've been left with, this grey film will not budge, is there anything? Vinegar doesn't work

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Any suggestions? When wet the slabs look fine with no trace of staining.

Posted by Tony McC on 01 Aug. 2017,10:50
Have you asked the manufacturer? They may have a preferred solvent. Aternatively, look at someting such as Resin-ex, Paramose, Wax-off or similar.
Posted by Eds9332 on 01 Aug. 2017,20:41
I have contacted the manufacture, and all the can come up with is using vinegar! Which insedently doesn't work!

Would I be better off using a cement removal product?

Never used Sika/ever build products, not fit for purpose

Posted by R&A Pressure Washing on 02 Aug. 2017,13:05
Be very careful using a cement removing product, as it will most probably be a Hydrochloric acid based product so can damage natural stone if you are not careful.
You have a couple of choices you could Phosphoric acid substitute, less aggressive then Hydrochloric acid, and usually safe on sandstone, or get the stain professionally removed.

Posted by Eds9332 on 03 Aug. 2017,10:48
I have been communicating with the supplier and they are going to arrange a site visit to inspect the damage caused by their product, if it can be professionally cleaned what sort of person can do this and what actions would they take to takle the staining?

Thanks

Posted by R&A Pressure Washing on 03 Aug. 2017,17:55
Someone who knows how to clean paving properly and preferably who has a low speed rotary cleaner, and the knowledge on how to do this.
Posted by Tony McC on 09 Aug. 2017,10:22
Quote (Eds9332 @ 03 Aug. 2017,11:48)
I have been communicating with the supplier and they are going to arrange a site visit to inspect the damage caused by their product,

Did they ever turn up, and, if so, what was their suggested remedy?
Posted by Eds9332 on 12 Aug. 2017,23:16
A representative is coming over a week Thursday to assess the damage, I don't hold much hope, as they initially suggested that vinegar was the only remedy!

Will let you know the outcome.

Posted by R&A Pressure Washing on 13 Aug. 2017,07:32
Quote (Eds9332 @ 12 Aug. 2017,23:16)
A representative is coming over a week Thursday to assess the damage, I don't hold much hope, as they initially suggested that vinegar was the only remedy!

Will let you know the outcome.

I know someone over your way that could possibly look at this for you, he is also a stone expert, cleaning, stain removal etc.
Just let me know and I can put you in touch with him.

Posted by Eds9332 on 16 Sep. 2017,00:34
Ok so has been over two weeks since the site survey, a rep came over from everbuild to take pictures and do a drainage test with the pavefix plus joints, nothing seems to be moving on from this sadly.

Vinegar just doesn't cut it, I've used different brands, leaving it on different times with scrubbing after. I have noticed randomly if I use a heat ie a lighter on areas it removes it, but on the whole not a great idea.

LTP grout stain remover along with other chemical cleaners have also been used, however I have been careful as the LTP contains hydrochloric acid, but still no joy!

I am condsidering a motorised power wash as I have used my Karcher on it and there are signs that it has started to remove a small patch.

Posted by R&A Pressure Washing on 16 Sep. 2017,07:52
If you are going the pressure wash route then you are going to need either a Doff or Torik machine, super high heat low pressure both can be rented one of those and the correct chemical should/will remove the resin
Posted by Eds9332 on 25 Sep. 2017,16:48
Quote (R&A Pressure Washing @ 13 Aug. 2017,07:32)
Quote (Eds9332 @ 12 Aug. 2017,23:16)
A representative is coming over a week Thursday to assess the damage, I don't hold much hope, as they initially suggested that vinegar was the only remedy!

Will let you know the outcome.

I know someone over your way that could possibly look at this for you, he is also a stone expert, cleaning, stain removal etc.
Just let me know and I can put you in touch with him.

I am interested in this, can you tell me where he is based?
Posted by R&A Pressure Washing on 25 Sep. 2017,17:54
Quote (Eds9332 @ 25 Sep. 2017,16:48)
Quote (R&A Pressure Washing @ 13 Aug. 2017,07:32)
Quote (Eds9332 @ 12 Aug. 2017,23:16)
A representative is coming over a week Thursday to assess the damage, I don't hold much hope, as they initially suggested that vinegar was the only remedy!

Will let you know the outcome.

I know someone over your way that could possibly look at this for you, he is also a stone expert, cleaning, stain removal etc.
Just let me know and I can put you in touch with him.

I am interested in this, can you tell me where he is based?

The guy & company to speak to is
Bud Mott
Clean'N'Seal 0800 6122 462
They are based in Bristol, if you mention my name, Bud is aware you might be getting in touch.

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