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Product Details

Hydrochloric acid-based cleaner for trade use only. Removes heavy cement and mortar stains from brick, concrete, paving, scaffolding and tools. For exterior use.

Hydrochloric acid based cleaner for exterior use. Removes stubborn stains, limescale, ingrained dirt, heavy cement and mortar stains from brick, concrete, paving and patios, scaffolding and tools.
Apply by brush. Use protective goggles, gloves and clothing to cover face, eyes and skin. For exterior use only.
Dilute as stated and test on a small concealed area before proceeding to clean the whole area.

Technical Specification
Brand Bostik
Unavailable offshore
Age restricted (18)
Manufacture ID 30812503
Safety Data Sheet click here
Volume (L) 5
Delivery details
Order value: Under £10 £10 & over
Express usually Next Business Day before 6pm £5 Free
Turbo usually Next Business Day before 12 noon £10 £5
Remote areas standard delivery (2-4 days) £5 Free
Order Value: Under £25 Over £25 but less than £75 £75 & Over
£10 £5 Free

Please note items delivered by our suppliers are not available for the options above. Delivery times may vary.

More about Delivery & Returns
Click & Collect details
If you are using our Click & Collect service please note the following:
  • Order online or over the phone and collect in branch from 5 minutes later.
  • Ensure you check stock is available for collection at your chosen branch.
  • Check branch opening hours to ensure you have sufficient time to collect.
  • For items not available for same day collection, place order before 8pm Mon-Sat (4pm Sun) and you can collect Next Business Day (Mon-Fri) after 3pm.
  • If we have your mobile number, we’ll send you a text when your order is ready to collect.
Bostik Concentrated Mortar & Brick Cleaner 5L is rated 4.5 out of 5 by 36.
Rated 5 out of 5 by from Excellent Perfect product for what I need it for
Date published: 2019-11-12
Rated 5 out of 5 by from Heavy limescale remover. Used for limescale removal on a toilet. The limescale was very heavy, thick and caked on. Having tried other cleaners which did not touch it this cleaned it off like new in minutes. Wish i had used this first.
Date published: 2019-11-01
Rated 4 out of 5 by from Strong cleaner Strong acid cleaner does the job well.
Date published: 2019-10-25
Rated 4 out of 5 by from Good for the money As the title says, its good for the money, works well and cheap enough. It is an acid so be careful with the use of it and wear PPE. It has a good child proof top on it which I think is wise. Read the instructions!!!!
Date published: 2019-10-24
Rated 5 out of 5 by from Exceeded my expectations I used this product with a stiff brush and a jetwash and the finish was fantastic
Date published: 2019-10-21
Rated 5 out of 5 by from Works well Really impressed worked really well cleaned mortar off brickwork as required
Date published: 2019-09-16
Rated 5 out of 5 by from Excellent effective product I have bought this in desperation - after 2 months of nearly constant raining even strawberries parsley and pansies started growing between and on top our block pavement, not mention moss, algae, lichen, grass and other common weeds, many of them knee high. I thought that I can stand a chance with powerful wild Scottish Nature only with the concentrated Hydrochloric Acid. We have used previously a good few pavement cleaners but they seemed to add nutrients to the weeds, making them no harm, but rather increasing their growth. This stuff is different – it’s really powerful, after only 1st spraying application, within a few hours the moss changed color and within a 2-3 days weeds and all plants dried and died. The Cemetone seems to work not only on overground parts, but as well underground, making roots to dry and shrink, so they are very easy to remove from the pavement with the hoe. It would be much quicker to jet wash, but we did not want to add water, as this would encourage weed growth after a few months (previous experience). After scrubbing the pavement 2nd spraying application to keep the pavement clean from weeds for longer. Side effect is that pavement is slightly cleaner even without pressure washer. We have used very concentrated solution - 2 parts of water and 1 part of acid, remembering to add acid to water. This solution did not dissolve/effervesce brick block pavement. Great product, easy to use and did perfect job getting rid of all the various plants from the pavement.
Date published: 2019-09-10
Rated 5 out of 5 by from Excellent effective product but needs care. This is concentrated Hydrochloric acid, so dilution required for most scenarios. Mix Acid product to Water, not water to acid, and extreme care. safety glasses, gloves. No fumes from 5L bottle, but this HCL/Alcohols is odourless, so well ventilated required if diluting indoors. Undiluted this product will immediately start to dissolve/effervesce chalk, calcite deposits, concrete, efflorescence, calcium carbonate and requires dilution. On bricks wet surfaces firsts to stop absorbtion. Do not allow cleaning process to dry as even harder deposits can occur. Even at very dilute 30 parts water to :1 dilution as still effective however hours required. Manufacturer's Label dilution of 4:1 advised on label but 10:1 to 15;1 as even safer and still effective.
Date published: 2019-08-13
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