ETA approval for KÖSTER NB 1 Grey (mineral sealing slurry)

European harmonization established the Construction Products Directive (Directive 89/106 / EEC) according to which construction products must have a CE for specific application procedures (if available) before they are authorized to be introduced to the market.

Currently, there is no corresponding standard directive for sealing slurries in the waterproofing section. Therefore, the KÖSTER BAUCHEMIE AG and other suppliers on the market have been adopting other certification standard systems to represent products, e.g. EN 1504-3.

KÖSTER BAUCHEMIE AG decided to issue a certification system at the European Organization for Technical Assessment (EOTA) commonly known as a European Technical Assessment (ETA) for the two product of KÖSTER NB 1 Grey and KÖSTER Polysil TG 500.

For this procedure, the EOTA draws up a product-specific evaluation procedure, which leads to a European approval, which is equivalent to the usual certification and leads to a CE mark. This European technical assessment includes:

  • A general description of the product system which, e.g., Details of the processing and application.
  • A description of the most important technical characteristics, e.g., Compressive strengths, adhesive tensile strengths, and properties such as pressurized water-tightness against negative pressing water or frost-thaw resistance.
  • Parameters which can be used for quality control and identification of the product.
  • Furthermore, a catalog of assessment measures enables the execution of an external production control by a notified body under the System 2+ procedure.

With the help of this European technical evaluation document, it is then possible for the production system in question to be monitored by a European notified body, so that the production system can be marketed throughout the European market without any market constraints.

This process has now been completed for KÖSTER NB 1 Grey so that the product can be sold in the future as a mineral sealing slurry via a CE mark.

This creates an excellent market position for KÖSTER BAUCHEMIE AG, as we are currently the only company on the market to have an ETA for a sealing slurry.


Further product information and TDS of KÖSTER NB 1 Grey




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