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Posted: Sat May 10, 2003 10:35 pm
by Rob UK
Please can anyone suggest a cleaning solution for the removal of concrete residue from my patio slabs. The men who laid the patio had allowed it to dry and I have tried pressure cleaning to no avail.
Your advice would be most appreciated...
Rob UK
Posted: Sun May 11, 2003 6:13 pm
by krismac
If you have lumps or snots of cement on your slabs try tapping them gently with a hammer but dont damage the slabs,that way you break down the lumps which then you can pressure wash off the residue easier.If that fails try using a watered down acid solution which you should apply all over your patio using a decorators roller on a pole.Then wash over all your patio.This method means any discoloration will be evenly spread and not patchy.
Posted: Mon May 12, 2003 4:08 pm
by 84-1093879891
Kris is right - use a diulte Brick Cleaning Acid (Hydrochloric, sometime called Muriatic) which you can get from a decent BM. BE CAREFUL - it's nasty stuff and will take the skin off your hands if splashed about willy-nilly.
There's more info on cleaning cement stains on the
Dealing with Stains page of the main site.