Features and Benefits

Fine filling compound

1- component fine filling compound for repairing concrete up to 5 mm layer thickness


  • For concrete class above C12/15
  • Low shrinkage
  • Resistant to frost and de-icing road chemicals
  •  Fast hardening
  •  For vertical and horizontal surfaces
  • Amount required: approx. 1.5 kg/m2 for 1 mm layer thickness

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Ceresit CD 24 is used to smooth out concrete and reinforced concrete, to fill cracks/voids and repair damaged substrates up to 5 mm. It is suitable for closing cracks and pores e.g. before applying the paint coatings.

CD 24 is part of the concrete repair system Ceresit PCC, which additionally consists of CD 25, CD 26, CD 30. The system is designed for filling cracks/voids and re-profiling balconies, as well as for making complex repairs for various types of cement and reinforced concrete structures, such as balconies, overpasses, reinforced concrete ditches, ceilings, tanks (including waste treatment plants), flyovers, frame structures and multi-board structures, monolithic structures (including swimming pools), chimneys, etc.

Step by step

Substrate preparation


Ceresit CD 24 adheres to crack-free, load-bearing, clean concrete substrates free from any substances, which may impair adhesion. The substrate should have sufficient compressive strength (concrete class above C12/15) and pull-off strength of minimum 1,0 MPa. Concrete Corroded and carbonated concrete and any loose elements should be carefully removed. Any stains, the layer of cement wash, anti-adhesion agents, old layers should be mechanically removed. The surface of the concrete should be rough and porous, ensuring good adhesion. The substrate should be mechanically prepared e. g. through abrasive blasting, grounding or milling. Reinforcement The corroded reinforcing bars should have the concrete support removed up to the places which are not corroded. The reinforcing bars should have rust removed by sand – blasting to the degree of cleanliness of Sa 2,5 so that they acquire clear, metallic appearance and then they should be cleaned with compressed, oil free air. Then the reinforcing bars should be covered with anti-corrosion paint CD 30 twice and any voids should be filled with repair mortar Ceresit CD 25 or CD 26. In case of applying the filler CD 24 on the repair mortar CD 25 or CD 26, mortars should be sprayed with water until the surface appears to be slightly damp. In case of the application of the filler directly on the concrete substrates, they should be first sprayed with water without any puddles formed and then the slightly damp substrates should be covered with the contact layer of Ceresit CD 30. The filler should be applied on the slightly damp contact layer, however, not longer than after 30–60 minutes. In case of exceeding this time, the contact layer should be applied once again provided that the previous layer is completely dry.



Preparation of the mortar: The content of the packaging should be poured to the measured amount of clean water and mixed with the slow rotating drill with a mixer until the homogenous mass without lumps is obtained. Then it is necessary to wait 3 minutes and mix the mortar once again. Mixing ratio: 1 part by volume of water to approx. 4,9 parts by volume of CD 24 powder. Application of the mortar: Within the pot life the ready mortar should be applied with the trowel on the damp substrate or in case of the filled concrete on the freshly applied contact layer of Ceresit CD 30, then it should be smoothed or the texture should be formed if necessary. The surface of the filler CD 24 can immediately be smoothed with the steel trowel or with the plastic trowel or sponge within 10–45 min. Within the pot life ready mortar should be applied on the wet substrate with a trowel or in case of the contact layer with Ceresit CD 23 it should be applied with a trowel and shaped as needed. In case of the application of mortar in several layers the time between the consecutive applications should not exceed 3 hours. Otherwise it is necessary to wait 24 hours, make the substrate damp again, to apply contact layer and only then to re-apply the filler Additional protection of concrete: The additional protection for concrete against corrosion, harmful water impact, frost, aggressive agents and weather is to cover the mortar of CD 24 with acrylic paint Ceresit CT 44 or flexible insulation layer Ceresit CR 166. These layers can be applied after 3 days of CD 24 application.