Removes mortar residues, cement laitance and other marks left by building work. An acidic product with a pH of approx. 2 - keep it away from metal, galvanised and painted coatings, and render. One litre covers 2-6 m², depending on how heavily soiled the surface is.
Block pavingD-2B is an acidic product that removes post-construction soiling: mortar residues, cement laitance and the marks left by bricklaying and rendering.
Mask the surroundings before you start, because the product must not contact metal surfaces, galvanised or painted coatings, render or absorbent materials.
You set the strength to the scale of the problem: dilute 1:1 for heavy soiling, and use it undiluted for extreme soiling. Coverage is 2-6 m² per litre, pH approx. 2.
The usual reason a sealing job fails is not the product but the substrate. A sealer will not bond to a surface with grease, lime efflorescence or an old coating on it.
New paving has to season first - usually around 28 days from the date the block was made. You will find the exact time for each product in its technical data.
Before sealing the whole area, test on a patch hidden by a planter or in a corner of the patio. The same product can read differently on two batches of the same material, and on a surface with old coating left on it, it will not bond at all.
Only if you want it to. An invisible product leaves the colour alone, a wet-look sealer deepens it permanently, and a colour sealer gives it a new shade.
By how the water behaves. While it still beads on the surface, the treatment is working. Once water starts soaking in and dark patches return after rain, the protection has worn out.
No. Water occupies the pores the product is meant to enter, and stays trapped under the film. The result is often a milky bloom that cannot be removed without stripping the coat. The exceptions are the few products that tolerate slight surface dampness.
Not if you choose a penetrating product - it forms no film on the surface and does not change its grip. If the surface is already slippery, choose an anti-slip treatment rather than a sealer.
For very heavy soiling dilute it 1:1, one part product to one part water - a litre of concentrate gives two litres of working solution. For extremely heavy soiling use it undiluted.
Both are acidic, but they do different jobs. D-2B removes post-construction soiling - mortar and cement laitance. D-2W deals with lime and carbonate efflorescence, which appears later, once the surface is in use.
It can, if you do not protect them. An acidic product acts on the cement binder and must not come into contact with render or absorbent materials. Mask metal edgings and painted elements before you start.
Enter the area and how absorbent the substrate is. We work out the litres and the packs.
Depending on how heavily soiled the surface is and on its texture.
Example for 45 m²
11.3L
Enter your own area to calculate for your job.
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