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Posted: Tue Apr 09, 2013 6:49 am
by hippo
Hello Folks ,
Last autumn , I laid a pathway and patio using indian sandstone . After about 6 weeks I sealed it using Resiblock colour enhancer .
With the benefit of hindsight , I realise this was a bit too soon , (the manufacturer reccomended 8 weeks) , as now , Ive got a problem with efflorescence .
I`m wondering what is the best solution is to get rid of it . Will I need to scour off the top surface , and re-seal ? Ive tried using a scrubbing brush with soapy water , but its no use .
Any ideas would be a great help .
Thanks
Posted: Tue Apr 09, 2013 7:02 pm
by rab1
Is the efflorescence coming from the stone or the pointing as this is normally a concrete/cement problem unless a really porous stone was used and its wicking through from the base.
Posted: Tue Apr 09, 2013 8:38 pm
by msh paving
you stand very little chance of removing the resiblock,Roger Oakley from R+A pressure washing will be along soon he will give the best advice to remove the resiblock MSH
Posted: Tue Apr 09, 2013 9:21 pm
by RAPressureWashing
Hippo,
This is not going to be a nice job I'm afraid, first point of call is here www.paramose.com, I'd give them a call and see what they recommend, as they do Resiblock polyurethane removers, but to date I have not had to remove any of Resiblock Sandstone sealers and don't want to give you the wrong product name. Sealer removal is not for the faint hearted as the PPE & H&S side of things really does need to be taken seriously as the chemicals you would be using are not nice.
Posted: Tue Apr 09, 2013 9:22 pm
by hippo
rab1 wrote:Is the efflorescence coming from the stone or the pointing as this is normally a concrete/cement problem unless a really porous stone was used and its wicking through from the base.
I think its coming through the stone , as its spread across the surface . Either that , or its coming from the sealer !
Posted: Tue Apr 09, 2013 9:26 pm
by hippo
R&A Pressure Washing wrote:This is not going to be a nice job I'm afraid, first point of call is here www.paramose.com, I'd give them a call and see what they recommend, as they do Resiblock polyurethane removers, but to date I have not had to remove any of Resiblock Sandstone sealers and don't want to give you the wrong product name. Sealer removal is not for the faint hearted as the PPE & H&S side of things really does need to be taken seriously as the chemicals you would be using are not nice.
Thanks Roger !
. Do you think it would be possible to scour off the efflorescence , and the sealer with it , using a rotary wire brush , rather than using the chemicals ?
Posted: Tue Apr 09, 2013 9:35 pm
by RAPressureWashing
hippo wrote:R&A Pressure Washing wrote:This is not going to be a nice job I'm afraid, first point of call is here www.paramose.com, I'd give them a call and see what they recommend, as they do Resiblock polyurethane removers, but to date I have not had to remove any of Resiblock Sandstone sealers and don't want to give you the wrong product name. Sealer removal is not for the faint hearted as the PPE & H&S side of things really does need to be taken seriously as the chemicals you would be using are not nice.
Thanks Roger !
. Do you think it would be possible to scour off the efflorescence , and the sealer with it , using a rotary wire brush , rather than using the chemicals ?
Doubtful, sealers are supposed to be long lasting and stand up to some abuse, plus the rotary wire brush will most probably mark/scratch the surface which will look worse in the long run.
Isn't the Resiblock an impregnating sealer?
Posted: Thu Apr 11, 2013 5:26 pm
by London Stone Paving
Sounds like a bit oif a mess. It would be good to see some photos, I know somebody who might be able to advise.
Posted: Mon Apr 15, 2013 11:08 am
by hippo
Here are a couple of snaps
[img]file:///C:/Users/Colin/Pictures/2013-04-15%20Edinborough%20April%20%6013/Edinborough%20April%20%6013%20045.JPG[/img]
[img]file:///C:/Users/Colin/Pictures/2013-04-15%20Edinborough%20April%20%6013/Edinborough%20April%20%6013%20048.JPG[/img]
Posted: Mon Apr 15, 2013 9:05 pm
by GB_Groundworks
Sounds like the typical slabs wet or damp, not dried out properly moisture sealed in problem more than efflorescence.
Posted: Tue Apr 16, 2013 9:00 am
by London Stone Paving
Cant see photos