Sika produces a full range of hydrophobic impregnations and protective coating systems for the protection of the exposed larger areas  on cooling towers and chimneys.

Hydrophobic impregnations

The pores and capillary network are not completely filled, but only lined with hydrophobic material.

Sikagard® 700 S - Siloxane based water repellent impregnation

Sikagard®-700 S is a one part water repellent impregnation for absorbent cementitious substrates. It penetrates well into the open pores of the substrate, providing durable water repellency, while still allowing water vapour diffusion in both directions. Sikagard®-700 S complies with the requirements of EN 1504-2 for hydrophobic Impregnation (penetration depth class I)  


Sikagard® 740 W - Silane based reactive water repellent impregnation

Sikagard®-740 W is a one part low viscosity, reactive impregnation for concrete and cementitious substrates based on concentrated Silane emulsion. Sikagard®-740 W complies with the requirements of EN 1504-2 for hydrophobic Impregnation (penetration depth class I & resistance to freeze and thaw salt stresses) Sikagard®-740 W is classified as sealer Type 1b to the ALBERTA infrastructure and transportation specifications.



Protective Coatings for Concrete

Blocks surface pores against the entry of  water and carbon dioxide, thus effectively halting carbonation, whilst water vapour diffusion can continue.

Sikagard® 680 S: Protective Coating for Concrete

Sikagard®-680 S is a one part solvent containing coating, based on methacrylic resins resistant to weathering, alkalis and ageing. It is available in clear and coloured grades for use on mineral substrates including concrete and other cementitious surfaces Sikagard®-680 S protects concrete against aggressive atmospheric influences and promotes a self-cleaning effect on the treated surfaces. It does not adversely influence the characteristic texture of the concrete. Sikagard®-680 S complies with the requirements of EN 1504-2 as protective coating.  

Anti carbonation systems which are elastic and crack-bridging. Allows thermal and dynamic movement in the structure.


Sikagard® 550 W Elastic: Crack Bridging Protective Coating for Concrete

Sikagard®-550 W Elastic is a one component, plasto-elastic coating based on  UV-curing acrylic dispersion with excellent crack-bridging properties even at temperatures below 0°C. Sikagard®-550 W Elastic complies with the requirements of EN 1504-2 as protective coating.



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