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 0.25 l/m² into packs?

Multiply the area by the consumption: 40 m² × 0.25 l/m² is 10 litres. Note that this is the inverse of "square metres per litre" - the higher the number, the more product you use.

Are two hours to rain enough?

At 20 °C, yes - that is the minimum time the surface needs protecting from rain. At lower temperatures and higher humidity drying takes longer, so plan the job with some margin in the forecast.

Water-based sealer for concrete and precast units EH-17 EKSIL

Protects concrete and precast concrete products against water with an invisible film that changes neither the appearance nor the colour of the material. The water-based silane sealer dries in 1-2 hours at 20 °C; keep rain off the surface for at least 2 h after application.

Surface

Block paving

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Product image: Water-based sealer for concrete and precast units EH-17 EKSIL

Block paving

EH-17 is a water-based silane sealer aimed at concrete and precast concrete products - edgings, palisades, garden elements, blocks.

What sets it apart is the pace of work: drying in 1-2 hours at 20 °C and protection from rain for a minimum of two hours. With a short weather window that is a real advantage over products needing a full day.

Consumption is 0.20-0.35 l/m² on concrete and 0.20-0.25 l/m² on precast units. The film is invisible and changes neither the appearance nor the colour of the material.

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
Base: water-based
Finish: invisible
Application method: roller, brush, low-pressure spray
Dilution: Do not dilute
Application temperature: +5 to +35 °C
Drying time: 2 h
Where to use: indoors, outdoors
Chemical base: water-based silane sealer
Appearance: milky liquid; the dried film is invisible
Density: 1.00-1.04 kg/l
pH: 13-14
Consumption - concrete: 0.20-0.35 l/m²
Consumption - precast concrete: 0.20-0.25 l/m²
Substrate temperature: 5-25 °C
Protect from rain: minimum 2 h after application

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 0.25 l/m² into packs?: Multiply the area by the consumption: 40 m² × 0.25 l/m² is 10 litres. Note that this is the inverse of "square metres per litre" - the higher the number, the more product you use.
Are two hours to rain enough?: At 20 °C, yes - that is the minimum time the surface needs protecting from rain. At lower temperatures and higher humidity drying takes longer, so plan the job with some margin in the forecast.