The web version of the Catalog is available at www.recyklujmestavby.cz and you can find the complete contents of the printed version there. In addition, the online version also contains an open database of products containing secondary raw materials. This database is completely open, both for viewing and for inserting new products, and it is expected to be gradually supplemented based on the expansion of the market for these products and materials. The website also provides an overview of organizations and companies that deal with recycling in the construction industry. Furthermore, the website is supplemented with examples of good practice in which recycled material was successfully used for new construction.