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.

Why must the second coat wait a day?

Because the first has to release its solvent and bond with the concrete. A second coat applied too early dissolves the first instead of resting on it, and the result comes out patchy.

Can I work in hot weather?

No. The air and substrate temperature should be within 5-25 °C. On paving warmed by the sun the solvent evaporates before the product can penetrate.

Will the effect be as strong on light paving as on dark?

Not necessarily. EI-15 darkens the colour strongly and is intended for dark and coloured paving. A test on a small section before the full job shows how your paving will change.

Block paving sealer, strong wet look EI-15 EKSIL

Deepens the colour of block paving and concrete for a wet look. Apply this solvent-based sealer in two thin coats at least 24 hours apart, with the substrate at 5-25 °C.

Surface

Block paving

See the whole range

Block paving

EI-15 is the classic wet look for paving: a solvent-based product that deepens the colour of concrete distinctly rather than subtly.

For the full effect, apply two thin coats at least 24 hours apart, at an ambient and substrate temperature of 5-25 °C. One thick coat does not substitute for two thin ones - the excess stays on the surface.

Coverage is 8-10 m² per litre for one coat, and the sealer reaches full durability about a day after the last coat. For large areas, the 20- and 30-litre containers are the practical choice.

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.

Coverage: 8-10 m²/l
Coats: 2
Base: solvent-based
Finish: wet look
Application method: roller, brush, spray
Dilution: Do not dilute
Application temperature: +5 to +25 °C
Full cure: 1 day
Where to use: indoors, outdoors
Appearance: clear liquid
Density: approx. 0.9 kg/l
Interval between coats: minimum 24 h
Substrate temperature: 5-25 °C
Recommended substrates: dark and coloured block paving and concrete

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.
Why must the second coat wait a day?: Because the first has to release its solvent and bond with the concrete. A second coat applied too early dissolves the first instead of resting on it, and the result comes out patchy.
Can I work in hot weather?: No. The air and substrate temperature should be within 5-25 °C. On paving warmed by the sun the solvent evaporates before the product can penetrate.
Will the effect be as strong on light paving as on dark?: Not necessarily. EI-15 darkens the colour strongly and is intended for dark and coloured paving. A test on a small section before the full job shows how your paving will change.