Limits the ingress of water and oils into concrete, brick, engineering brick, sandstone and rough stone without changing their colour. The water-based silane sealer forms an invisible, vapour-permeable film.
Concrete and floorsEH-20 (Ekspert Protect) is the most versatile water-based sealer in this range: it works on concrete, brick, engineering brick, sandstone, natural stone and rough marble and granite, on vertical and horizontal surfaces.
It is water and oil repellent - it limits the ingress not only of water but of oils, which matters on a patio, in a garage and under a barbecue. The film is invisible and vapour-permeable, so it does not change the colour of the material or close off diffusion.
Coverage is 4-12 m² per litre. The wide range reflects how differently substrates absorb: on smooth, dense concrete you will be near the upper figure, on thirsty sandstone near the lower. Drying time is at least 24 hours.
Stone forgives less than concrete. An acidic cleaner used on marble or travertine will etch the surface irreversibly, and excess sealer on a polish leaves a smear that can no longer be removed.
After sealing, polished stone usually stays out of use for 72 hours.
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.
Not always. Marble is soft and sensitive to acids, granite is not, so the product has to match the type of stone. Before you buy, check that marble is on the list of recommended substrates.
With cleaning products of the right pH. For the polished-stone range that is usually pH 5-9 for the invisible versions, and a wider range for the wet-look ones. You will find the range for your product in its technical data.
It helps, though not in every case. It limits the ingress of water and the compounds dissolved in it, including those that discolour stone from below. It will not stop processes inside the stone itself, or rust from fixings.
Because EH-20 works on materials of very different absorbency - from rough granite to thirsty sandstone. When ordering, work out your area with the calculator and pick the absorbency setting that matches your substrate.
EH-20 is wider in use and cheaper; it works between 10 and 30 °C. EH-21 is a fluoropolymer dispersion aimed at natural stone and facades. Both are water-based, colourless and water- and oil-repellent.
No. EH-20 is intended for marble and granite with a rough finish. For polished stone choose the SG and SM ranges - a penetrating sealer has nowhere to go on a polish.
Enter the area and how absorbent the substrate is. We work out the litres and the packs.
The wide range reflects how differently substrates absorb: the more absorbent the material, the more product it takes.
Example for 45 m²
5.6L
Enter your own area to calculate for your job.
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A sealer will not bond to a dirty surface. Start by cleaning it thoroughly.
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