Heavy Efflorescence On Block Walls

[GrantMcscott]

Hi

Can anyone advise what is the best way to remove efflorescence from block work before I put stone cladding on and get the house rendered? It is very thick and there is a lot of it what is the best thing to clean it off with have tried vingar with liitle effect except it started to make a fizling noise

 

[Mr Punter]

Stiff brush, jetwash.

[Canski]

Ok I meant to post this the other day but forgot. It comes from a professional brick cleaning company and they swear it works if carried out correctly. 

[Temp]

Bond It Brick Acid says its 16% Hydrochloric acid. 

https://www.mgnbm.co.uk/bond-it-brick-acid-5-litres-bdh085/?srsltid=AfAwrE7vK1Ef8OIpidl1uLMnnFYdlaTwQGXqZfWfrOBEV9fPgfHS_PCgL8E

 

Edited April 3, 2023 by Temp

[GrantMcscott]

2 hours ago, Canski said:

Ok I meant to post this the other day but forgot. It comes from a professional brick cleaning company and they swear it works if carried out correctly. 

 

Hi Just interpreting you notes

So I get hydrochloric acid 16% the one @Temp gave a link to.  Spray it on wait until the fizzing stops - spray on again wait until fizzing stops this process should not take more than 2 minutes then presure washer off

 

Is that correct not sure why you note has 2 references to hydrochloric acid at the top 

 

thanks

Edited April 3, 2023 by GrantMcscott

[Canski]

3 hours ago, GrantMcscott said:

 

 

Is that correct not sure why you note has 2 references to hydrochloric acid at the top 

 

thanks

I just passed it on but I looked and it seems to refer to hydrohalic acid and hydrocloric acid

Edited April 3, 2023 by Canski

[nod]

It’s Normal 

Plaster over it