Quality is at the heart of everything we do




Quality is a fundamental element of Lhoist's business policy. Our aim is to provide first-class products and services that will match your own standards.

Our plant received all the necessary official certifications and many of our products are produced in compliance with international standards such as ISO 9001 or equivalent.

To ensure that our company is always abreast of the current state of the technology, in order to be able to put legal requirements into practice in good time, we are members of several organisations mentioned beneath.


The plant Akdolit® of Istein is certified according DIN EN ISO 9001 and the safety cachet « Sicher mit System ». Akdolit® products also perform KIWA certification and are produced according the HACCP concept.

Download certificates


Bundesverband der Deutschen Kalkindustrie e. V.


Forschungsgemeinschaft Kalk und mörtel e.V.


Verein für Wasser-, Boden- und Lufthygiene e.V.


INTWA- Interessengemeinschaft norddeutsche Trinkwasserwerke e.V.


figawa Service GmbH - Bundesvereinigung der Firmen im Gas und Wasserfach


Arbeitgeberverband der rechtsrheinischen und westfälischen Kalk- und Dolomitindustrie e.V.


DVGW (Deutscher Verein des Gas- und Wasserfaches e.V.) - Technoligiezentrum Wasser