Re: Cleaning internal brick wall old Victorian2
Jan 14, 2021 9:10 pm
Try hydrochloric acid mixed at 10:1 ratio with water.
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Re: Cleaning internal brick wall old Victorian3
Jan 15, 2021 2:37 pm
As per chippy's advice above but don't make it any stronger than the 10:1 ratio as it leaves yellowish stains when it is too strong. Just make sure to sluice it down after with lots of water too to get rid of any remnant HCL acid.
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Thank you for your reply