How to use brick acid (Bostik mortar and brick cleaner)  

Great video, thanks for showing how its done

Very helpful and very clear, thank you.

This is so helpful thank you

You don't really need to buy a special brick cleaner. Just go to your local hardware store and pick up a 5L container of Hydochloric acid. You can water it down to 1 part acid, 4 parts water. (I've actually used the acid full strength to dissolve difficult to remove spots on occasions). When mixing, make sure you add the acid to water, not the other way around in case acid splashes upwards when the water hits it. Also, whenever you're cleaning a brick wall, avoid being heavy handed with overloading the brush with the liquid as you paint it onto a brick - Acid coming into contact with the mortar between the bricks will readily attack the mortar around a brick and weaken it. Ensure you hose down the wall thoroughly after the cleaning.

great vid, very thorough!

Brilliant advice steve

Thanks. Going to try it as the plumber left a right mess when he did the brickwork for the new boiler vent outside.

It looks no different... what did he remove?

The bricks look perfectly cleaned already. Would have been nice to have taped off half the wall and used product on one side only so that when done we could see the difference. Or if you only selected a few bricks to clean if tape idea wouldn’t work. Just a thought!

I sandblasted my victorian bricks. They look great, but have now realised my mistake. I should have used acid wash instead. The bricks are now more porous than they would have been before.

It would take me a year to clean each brick by hand.

Was very interesting but how do you do this with an internal brick wall..thanks

Those bricks didn't need cleaning.

can you this product to clean floor tiles many thanks

Nice video, do you know if it contains Hydrochloric acid. I’ve tried some other brands that are a bit “green” and don’t work very well.

I used the one from screwfix and the cement is still on their !

Boss" How many bricks you clean today fred. Im packing up boss. 2 whole bricks cleaned today boss. Boss" wow fantastic. Boss" so how long to you wash this house . Fred" 6 months, Boss" let me get my gun Fred " gun!" Why" Boss" Speed things up! Fred" arhhh kool