Welcome to DOYMA the leading manufacturer
of sealing and fire protection systems

DOYMA is a leading manufacturer of sealing and fire protection systems based in Oyten. Our mission is to seal or seal off building penetrations with pipes and cables against water, fire and flue gas. We operate in the three main competencies areas of civil engineering, building services technology and power supply and provide the market with:   

  • Sealing systems for pipes and cables     
  • Single and multi-line house entries for supply and disposal lines     
  • Fire protection products for preventive structural fire protection     
  • Special designs and custom-made sealing systems

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Consistent customer orientation, high reliability, excellent product quality and service orientation as well as sound technical advice with heart and mind have made DOYMA the epitome of a premium brand. DOYMA is synonymous with safe implementation technology and reliable structural fire protection, and is therefore highly recognized by planners, craftsmen and specialist dealers. As a traditional, medium-sized company, we have the knowledge, skills and flexibility to offer our customers a wide range of solutions at the highest technological level.

60 years of experience and the willingness to continuously improve our products, processes and skills are the basis of future-oriented innovations. Over 240 employees share their knowledge and skills with passion for your customers. Highly specialized competence teams for sealing and fire protection systems have answers to the most difficult questions and find solutions where others don't know what to do.


"At the beginning I was dealing with sound insulation for heating systems," remembered DOYMA company founder Hans-Ullrich Ihlenfeldt. "There were no such products on the German market yet: I imported this product directly from Denmark. With success! Through careful observation of the construction sector, I recognized an unsolved problem for planners and tradesmen: the sealing of building ducts by pipelines! Such seals should be easy to install and permanently seal against moisture. We consequently developed an innovative professional system consisting of fiber cement casing and sealing insert. A permanently sealed and precisely fitting complete solution. We showed the new development in 1967 at the ISH in Frankfurt. And that was a direct hit! "

The DOYMA GmbH & Co grew out of the consistently continued basic idea of ​​safe building implementation, which constantly continues its entrepreneurial success story.

DOYMA company founder and managing partner

*deceased on 12th of December 2019




Company history

Our company is constantly facing the challenges of the market. We want to constantly improve for the benefit of our customers and to safeguard our own interests in all phases of our service provision. Satisfied customers, healthy and motivated employees, the performance of our company and long-term, sustainable growth are the goals.     

  • Customer satisfaction    
  • High quality standard     
  • Market orientation and flexibility     
  • Quality responsibility     
  • Continuous responsibility for improvement     
  • Employee orientation     
  • Supplier relationships     
  • Environmental Protection


In Europe, but also worldwide, industrial, commercial and private buildings are safely built with DOYMA products: The focus of sales is on the European market with its own sales offices in Germany, Switzerland, Austria and England. We ensure reliable, comprehensive and fast market supply every day. In addition, we take our responsibility seriously to be a reliable partner of the trade. That is why we feel committed to the three-stage distribution channel. DOYMA is currently working with 17 sales partners and branches in the following 15 European countries:

France, Great Britain, Luxembourg, Netherlands, Belgium, Austria, Switzerland, Spain, Norway, Denmark, Romania, Slovenia, Bulgaria, Poland and Czech Republic

DOYMA contact persons


All information foryour arrival you find also in our flyer!


DOYMA GmbH & Co is based in Oyten near Bremen. Oyten is located near the Bremer Kreuz and can be reached via the highway A1, exit Oyten, or via the highway A 27, exit Achim-Nord - when traveling from the direction of Hanover. If you have left the motorway, follow the sign to Oyten. Approximately 400 m behind the traffic light crossing or the Autobahn exit A 1, turn right into Industriestraße. Turn left after approx. 600 m on the left-hand side of the street, at the end of the street you will find the DOYMA office building on the right-hand side, and then the production facilities. The buildings and parking areas are signposted accordingly. We look forward to you!


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