Ceresit Impactum

Ceresit CT 79 Impactum

Ceresit CT 79 plaster includes highly flexible elastomeric dispersions which, along with a group of other components like rheology modifiers and a complex of selected fillers, create the so-called elastomeric matrix. The additional advantage of this product is the reinforcement generated by the structure of glass, carbon and polyacrylamide fibres. This laminar and spatial complex allows the formation of a uniform, flexible plaster layer of high mechanical resistance, which is leakproof in terms of structure and surface integrity.

Ceresit CT 79 plaster key featuresshowhide
  • extremely flexible, reinforced with carbon, glass and polyacrylamid fibres combination
  • extremely resistant to weather conditions
  • extremely resistant to operating damages − 100 joule force even
  • extremely resistant for thermal stresses
  • self-cleaning (highly resistant to dirt)
  • very low water uptake
  • highly vapour permeable
  • highly resistant to fungi, algae and mould development
  • high colour stability
  • available in the entire Ceresit Colours of Nature colour palette
  • possibility of tinting in intense and dark colours
Extremely flexible and resistantshowhide

Ceresit CT 79 compensates all thermal deformations, preventing the system from microcracks appearing. Damage does not appear even under extreme and sudden changes in temperature, when cold rain droplets fall on the warm plaster surface. This high flexibility is maintained even in extremely low and high temperatures (from -30°C in severely frosty days to +60°C during hot summer). Ceresit CT 79 also ensures relaxation of any stresses caused by the building’s ‘movements’ and mechanical hazards which are related to the regular use of the building or acts of vandalism.

Resistant to water penetrationshowhide

Ceresit CT 79 features very low water absorbability, preventing the entire external thermal insulation system from moisture forming. This is due to plaster’s compact structure, its smooth and ‘closed’ surface, and most of all specially selected components of hydrophobic properties. Hydrophobic properties of the product are structural, which means that protection extends to the deeper layers. Thanks to this, no risk of discolouration of the facade surface, nor the gradual corrosion of the deeper layers of the thermal insulation are to be observed.

Resistant to biological damageshowhide

Due to Ceresit CT 79 plaster’s low water absorption even after heavy rains the facade dries out quickly with no moisture accumulation. Consequently, it does not offer suitable conditions for the development of unwanted micro-organisms such as mould, algae and fungi. The additional protection is provided by the plaster’s smooth surface and its ‘closed’ structure which stops the unwanted airborne contaminants from entering the Ceresit Impactum System. Maintaining resistance to biological corrosion, Ceresit CT 79 plaster stays aesthetic and ‘healthy’, thus it can provide an effective and long-term protection for the entire external thermal insulation system.

Resistant to dirt: the ‘self-cleaning’ effectshowhide

Hydrophobicity of Ceresit CT 79 plaster directly determine the so-called ‘self-cleaning’ effect of the facade, that is the possibility of washing dirt of its surface by atmospheric precipitation. Drops of rain do not penetrate into the hydrophobic structure of the plaster but create the kind of ‘pearls’ and run down along the surface taking dirt particles with them. The leakproof and smooth surface of the plaster reduces dirt particles sticking potential helping the whole process. Additionally, Ceresit CT 79 plaster’s surface is highly resistant to the static attraction of atmospheric pollution (with the so-called anti dirt pick-up effect), which also contributes to long-term and effective facade’s dirt protection.

Suitable for dark and intense coloursshowhide

Thanks to the capacity of compensating thermal stresses, Ceresit Impactum System with CT 79 allows for using dark or intense colours. These colours absorb a lot of light and heat, so the surface can get very hot and therefore in standard systems is liable to crack when the sudden temperature drop occurs. This is the HBW index (Light Reflectance Value) that defines the colours – the lower it is, the higher the absorption of light. Ceresit CT 79 elastomeric plaster is so flexible, that it can be tinted in dark and intense colours with the HBW index as low as 5%. This way investors and architects may take advantage of a broader palette of colours for finishing coatings of buildings in line with the latest trends.

Technical parametersshowhide
  • density: ca. 1,75 kg/dm³
  • temperature of application: from +5°C to +25°C
  • open time: ca. 15 min.
  • resistance to rain: from 24 to 48 hours, depending on temperature
  • estimated consumption: from 2,3 to 2,5 kg/m² (1,5 mm grain size)
Technical properties Standard Requirement Value
* in a system with CT 100
** in a system with CT 79

Water vapour permeability (Sd)* acc. to ETAG 004 ≤ 1,0 [m] 0,48 [m]
Water absorption (capillarity test) after 1 hour acc. to ETAG 004 ≤ 1,0 [kg/m²] 0,02 [kg/m²]
Water absorption (capillarity test) after 24 hours acc. to ETAG 004 ≤ 0,5 [kg/m²] 0,14 [kg/m²]
Bond strength after ageing** acc. to ETAG 004 ≥ 0,08 [MPa] 0,18 [MPa]

Ceresit CT 79 Impactum

Extreme flexibility of Ceretherm Impactum System

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