6.3 Concreate floor coating


This coating work method is indicative and deals with the coating of a concreate floor with the ELAPROOF+SAND system. The ELAPROOF+SAND floor covering system consists of ELAPROOF PRIMER primer, ELAPROOF+SAND floor covering and ELACOAT TOPCOAT RAL / ELACOAT TOPCOAT topcoat

The coating work method is not a repair plan or a construction plan. The overall design of the coating is always the responsibility of the site-specific designer.

Platform refurbishment

Adequate tensile and compressive strength is a key factor in the performance of coating materials. The concrete or screed substrate must be durable and have sufficient compressive strength.
The tensile strength of the substrate material is checked in accordance with EN 1542, and the tensile strength must be> 1.5 N / mm2 (1.5 MPa).
The compressive strength shall be checked in accordance with EN 12504-2, and the compressive strength shall be> 25 N / mm2 (25 MPa).
The substrate must be clean, sufficiently dry, and free of all contaminants such as dirt, oil, grease, weak coatings, and surface treatments.
If necessary, the weak layers are removed by sufficiently efficient mechanical methods such as grinding, milling, or blasting. In terms of coating, the best result is achieved if it is applied to a clean concrete surface with a roughness equivalent to a wood-ground concrete surface.

After cleaning, any cracks in the concrete floor are injected with injection resin meeting the EN 1504-5 standard, eg. HYDROPOX EP1.

Platform patching and levelling

Any cavities in the concrete surface are filled with a filling compound suitable for the coating combination before coating. If the concrete substrate to be coated has rough or uneven areas, they must be leveled with a leveling compound suitable for the coating combination. It should be noted that the irregularities tend to be visible on the coated surface.

Only special products that meet the above compressive and tensile strength requirements may be used to repair, straighten, and level the substrate. The suitability of the above products as a substrate for a liquid coating must always be ensured. from the product supplier.


Prior to coating, cleaned and repaired concreate substrates are primed with ELAPROOF PRIMER without the addition of water. Allow the primer to dry completely before applying ELAPROOF + SAND. The purpose of the primer is to seal the surface of the chipboard from the moisture released by the incoming coating.


If necessary, all structural joints and boundary points such as floor and wall joints, bushings, columns and seals of any floor wells, etc. are implemented with a combination of ELAPROOF INDOOR + ELAPROOF BASE FABRIC.

ELAPROOF INDOOR must be mixed before starting the seals. Use a whisk in the mixer that does not take air into the sealant when mixing, eg COLLOMIX KR series mixing paddle.

Apply ELAPROOF INDOOR sealant with a brush and press ELAPROOF BASE FABRIC onto the fresh compound so that all air escapes under the support fabric. Apply another coat of ELAPROOF INDOOR.

Sealing of one running meter (1 rmt) requires approx. 0.15 l of ELAPROOF INDOOR.

If the sealable bushings allow the pre-formed bushing to be threaded over the bushing into a collar, the bushings can be shaped, if necessary, for example, by cutting from N1 or N2 category geo-textiles, unless the ELAPROOF BASE FABRIC is wide enough to carry the penetration. ELAPROOF ROOF series reinforcement fabrics, available in widths of 150 mm, 350 mm and 1000 mm, can also be used for seals.

Possible connections to the floor drain are also made by cutting the floor drain grommet from N1 or N2 class geo-textile or by cutting the reinforcement fabric of the ELAPROOF ROOF series. The bushing is installed using or ELAPROOF INDOOR compound. Apply ELAPROOF INDOOR sealant with a brush and press the grommet onto the fresh compound so that all air escapes under the backing fabric. Apply another coat of ELAPROOF INDOOR. When the bushing has dried, cut a hole of a suitable size for the bushing and press the floor drain clamping ring into place before starting the ELAPROOF+SAND floor covering.


Before starting the coating, the ELAPROOF+SAND floor covering must be mixed. Use a mixing paddle in the mixer that does not take air into the sealant when mixing, eg COLLOMIX KR series mixing paddle.

The primed substrate is coated with ELAPROOF+SAND (M1 / EC 1) floor coating. The coating is applied to the substrate with a steel spatula.

ELAPROOF+SAND floor covering is applied to the substrate in two separate applications. The consumption of each application must be at least approx. 2.0 kg / m2, in which case the total consumption is approx. 4.0 kg / m2. The actual dry film thickness must be min. 2.0 mm.
The drying time between coats of ELAPROOF+SAND depends largely on the conditions at the installation site. At conditions of approx. + 20 °C, 50% RH can be applied a second time approx. 5 h after the first application. Lower temperatures and higher humidity significantly extend the drying time.

The ELAPROOF+SAND floor covering applied twice can be applied after approx. 12 hours in conditions + 20 °C, 50 % RH.


The dried ELAPROOF coating is treated with clear ELAPROOF TOPCOAT or tinted ELACOAT TOPCOAT RAL topcoats to facilitate cleaning and maintenance. For monochromatic floors, we recommend topcoating with tinted ELACOAT TOPCOAT RAL topcoat to even out any color differences in the ELAPROOF + SAND coating. On flaked floors, we recommend flaking with ELAPROOF Art&Deco Colour Chips on wet ELACOAT TOPCOAT RAL topcoat and, after drying, finishing with clear ELACOAT TOPCOAT topcoat.

In the topcoat, the topcoat component A is first mixed for 1 to 2 minutes, then the hardener component B is added to the mixed A component and mixed again for 2-3 minutes. Use, for example, the COLLOMIX KR series mixing paddle for mixing.

The mixture is applied on top of the dried ELAPROOF coating with a short-pile roller (6 – 7 mm) by cross-rolling. The consumption of the topcoat is approx. 110 – 200 g / m2 / application, depending on the degree of roughness of the selected ELAPROOF + SAND coating. The topcoat is dry to dry after approx. 16 h at + 20 °C, 50% RH. The full duration of mechanical stress is achieved under the above conditions in about 4 days and the full chemical duration in about 7 days.

NOTE! Some shades of ELACOAT TOPCOAT RAL topcoats may require 2 to 3 coats to achieve sufficient coverage!

Structural drawings

All structural drawings related to ElaProof products in DWG and PDF format from the ProdLib-service.

Build Care Oy owns all rights to this coating work method. Designers are free to use this coating work method when creating repair and coating plans!


Updated: 12/2021 | JKo

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