Block paving cleaner D-12K CTS Chemistry
Cleans everyday and organic soiling from block paving. Dilute the alkaline concentrate with water from 1:5 to 1:1, most often 1:4; work at up to 30 °C and 85 % humidity.
Block pavingBlock pavingD-12K is the version of D-12 developed specifically for block paving: it removes everyday, organic and greasy soiling from drives, patios and paths.
Dilute with water from 1:5 to 1:1, most often 1:4 - never use the concentrate undiluted. Work at temperatures up to 30 °C and at no more than 85 % humidity.
Before starting, mask everything that is not to be cleaned - edgings, metal fittings, planting.
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.
- Wash the paving. Lift oil stains with a degreasing cleaner - water alone, even under pressure, will not shift them.
- Remove lime efflorescence with a product made for it, not with hydrochloric acid from the builders' merchant.
- Make good the joints and let them set. Sealer applied over an empty joint runs straight into the sub-base.
- Wait until the paving is dry all the way through, not just on top. Moisture trapped under the film can bloom it white.
- Check the forecast. Rain within a day of application will wash off a fresh coat.
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.
- Coats
- 1
- Application method
- hand sprayer, brush (stiff), pressure washer
- Dilution
- Only after dilution with water: 1:5 to 1:1, most often 1:4.
- Max. humidity
- 85 %
- Where to use
- outdoors
- Form
- concentrate, alkaline solution
- Density
- approx. 1 kg/dm³
- pH of the concentrate
- approx. 12.5
- Note
- do not use undiluted; mask any surface that is not being cleaned
- Will the sealer change the colour of my paving?
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.
- How do I know when to seal again?
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.
- Can I apply sealer to wet paving?
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.
- Will sealing make the paving slippery?
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.
- How do I turn a dilution ratio into a quantity?
A 1:4 dilution means one part product to four parts water - a litre of concentrate gives five litres of working solution. Where the ratio is given in ml per litre of water (the C range), work the other way: 50 ml per litre means 20 litres of solution from one litre of concentrate.
- Is it suitable for coloured paving?
Test in an inconspicuous place. This is a product with a concentrate pH of 12.5 - even diluted it stays strongly alkaline.
- Should I use it before sealing?
Yes, that is the typical first step on old, greasy paving. After rinsing, let the surface dry all the way through before sealing.
How much will you need?
Consumption depends on how absorbent the surface is and how you apply the product.
Write to us with the area and the type of surface - we will help you work out how much you need.
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