About dga

Dortmunder Gußasphalt GmbH & Co. KG has been a leading manufacturer of bituminous construction materials for more than 40 years. As the dga-Group, we produce a wide range of products for road construction and building protection at five sites: Dortmund, Greiz, Großröhrsdorf and Vierlinden.


Whether enquiries about organisation, offers and orders or questions regarding technical applications – you can find the right contact for your concerns here.

Manufacturing locations

Dortmunder Gußasphalt GmbH & Co. KG manufactures quality products for road construction and building protection at a total of five locations throughout Germany. Each site is specialised in certain product groups.

Sales network

We also sell our quality products internationally. To this end, we work closely with our foreign sales partners. That means we’re always able to fulfil the needs of our customers specific to their country.

Research and development

Our success as one of the leading producers of bituminous products for road construction and building protection purposes rests on several pillars. Decades of experience and in-depth expertise are just two of them. The continuous improvement of our products and processes and the development of ever more efficient building materials have also fuelled our growth.

Quality management

We owe our strong market position in the road construction and building protection segments to our successful quality policy. Our customers have our full support throughout all stages of their project, including in-depth consulting, the development of customised solution and the delivery of the final product, ready for processing. Their planning security benefits from our reliability as a supplier.

Code of Conduct for Suppliers

In this Code of Conduct for Suppliers, Basalt-Actien-Gesellschaft and its affiliated companies have set out their requirements and principles for cooperation with their suppliers.