Brick acid -Which is best

[ruggers]

Which brick acid is best for cleaning up any mortar residue off brick faces.

 

Ive seen a few advertised as brick and patio cleaners but I'm wondering if they're too weak and i require a proper acid to dilute down.

 

My bricks are new and are light grey. I have a few area where the rain caught it before it fully set, whether thats efflorescence or not?

[nod]

Your correct The patio cleaners are just a watered down version and often more expensive Sika brick cleaner is full strength 3-1 will clean most stains 

[Dave Jones]

the one the builders merchant sells.

[Super_Paulie]

ive used this to clean my mixer and it works just fine.

 

Link

[SteamyTea]

Is brick cleaning acid now a notifiable chemical since that acid attack that blinded the local (to me) woman a few years back.

I get a drain maintainer fluid, that is notifiable.

So may need ID to purchase the good stuff.

 

(Been playing with pH 13.5 alkalines today, which oddly is not notifiable)

[ruggers]

On 14/10/2025 at 13:03, Super_Paulie said:

ive used this to clean my mixer and it works just fine.

 

Link

Thanks, I'd looked at this one the other day. I'll order some after ive checked the merchanta proce. Just wanted to check i was getting the good stuff and not wasting my time.

 

Definitely won't be using it for any crimes @SteamyTea, some people are just evil.

[Super_Paulie]

11 hours ago, ruggers said:

Thanks, I'd looked at this one the other day. I'll order some after ive checked the merchanta proce. Just wanted to check i was getting the good stuff and not wasting my time.

 

Definitely won't be using it for any crimes @SteamyTea, some people are just evil.

 

i used it to finish an internal brick wall i was leaving exposed as well. Ground off the majority, fill in the blanks and then a diluted brick acid over the lot. Came up like new. I did it on brick slips and that pulled a load of colour out of them though, you live and learn.