A water-based silane sealer for porous mineral substrates: concrete, brick, engineering brick, sandstone and rough stone. It forms an invisible, vapour-permeable film that limits the ingress of water and oils without changing the colour.
Surface
Concrete and floors
The surface the manufacturer intends this preparation for.
EH-20 (Ekspert Protect) is the most versatile water-based sealer in this range: the manufacturer lists 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 of 4-12 m² per litre is the widest range in the catalogue, and that is not imprecision: on smooth concrete consumption sits near the upper figure, on engineering brick and thirsty sandstone near the lower. Drying 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, manufacturers require the surface to stay out of use, usually for 72 hours. The exact figure is under "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.
Chemistry and finish. The -1 versions are single-component, siloxane-based and dry colourless. The -2 versions also contain modified silanes and deepen the colour for a wet-stone effect. Protection against water is the job of the product in both cases; what separates them is the finish.
Do not assume so. Marble is soft and sensitive to acids, granite is not - the manufacturer states the stone in the product's intended use, and our categories follow that. Every product lists its recommended substrates in the technical data.
Manufacturers of the polished-stone range state a permitted pH range for cleaning products - usually pH 5-9 for the invisible versions and wider for the wet-look ones. The figure for each product is under "Technical data".
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 the spread of absorbency across the materials the manufacturer allows is enormous - from rough granite to engineering brick. 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.
The manufacturer lists rough marble and granite. For polished surfaces the right products are the SG and SM ranges - a siloxane sealer has nowhere to go on a polish.
The technical sheet and safety data sheet will be available after approval.
Enter the area and how absorbent the substrate is. We work out the litres and the packs.
The wide range reflects how differently these substrates absorb - smooth concrete sits near the lower figure, engineering brick near the upper one.
Example for 45 m²
5.6L
Enter your own area to calculate for your job.
An impregnation will not bond to a surface with anything left on it. This is the most common cause of complaints.
Go directly to the right category. We do not imply compatibility across materials.