Best Method To Clean Bricks After Building Works - How To Remove Mortar Stains OFF Bricks/Walls 

That makes sense. As far as I understand it's the acidic bit that does the work as mortar is alkali, so vinegar could be a nice cheap-possibly safer for people and animals-method.

RU-vid's algorithm recommended this video to me too

this will be the style of the brick, seen it many times before

Use 1/8 acid the less the better

The mortar in between the bricks is a very thick compressed layer. The mortar on the brick is thin

Yes it is ive tried it and it works

No mate , acid only to remove morter residue , for efflorescence you will need other chemical is called flurotech or lcr or efflock

Your right my friend, water first checmical after

Yes i would believe so

No, you can't use Acid products on Indian Sandstone unless you are happy to see lots of iron oxidation. Your slabs can changed colour due to minerals (specially iron) and become orange/rusty coloured. Non acid product only.

It can destroy some soft handmade bricks and isn really too.dangerous for DIY job. RU-vid is full of amateurs teaching other amateurs how to use it

Toolstation or screwfix

Why? Thanks

@@AndrewHubbardBadger If you add water to acid the water will explode and splatter. Always add acid to water. Best way to remember is to think in alphabetical order. A into W Not W into A

Yep. You’re supposed to give them a quick wash and scrape off any mortar lumps. You want the acid cleaner working on stubborn shit, not loose stuff.

Makes absolutely no sense to wet the bricks first. All you're doing is diluting the acid when it goes on.

@@AJ-ds5gf no, you're stopping the capillary action of the brick pulling the acid into the pores...

@@illmitchjax LOL no. Adding water just dilutes the acid.

@@AJ-ds5gffor starters, you don't put brick acid on 'neat' anyway, it's meant to be diluted down to the amount specified on the bottle depending on usage and conditions. Secondly, a thin film of water on the substrate isn't going to notably dilute the acid... What it will do is prevent the acid being pulled into the brick by capillary action and potentially weakening the brick. You're only trying to remove mortar from the SURFACE of the brick...

Full