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 .
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.
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
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.
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 !
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 ?
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?
