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.
Our hot-processed and cold-processed bitumen products cover all stages and aspects of road construction: new roads, surface treatment, restoration and everything in between. In structural engineering, our building protection products protect new and old materials alike. Our various brands – BIGUMA®, DOBAU®, PROXAN®, NILA® and COLZUMIX® – guarantee fast and simple processing and long durability.
To view detailed information and extensive documentation about our standard products, please refer to our website. For our customers, we develop customised solutions to match any situation. We offer quality and expertise in all things bitumen. Professional advice and extensive customer support from the initial consultation to the development of the final products are parts of our service.
Get in touch. We will find the right product solution for you.