– The stainless steel sleeve with external lock
A ray of hope for underground repairs
Obduramus Umwelttechnik GmbH is active in the field of environmental engineering and develops and produces solutions for sewer rehabiliation. Our products provide solutions for a very diverse range of damage types within pipes.
Sewer rehabilitation using conventional materials can present significant challenges for local authorities as well as their contracted consulting engineers and repair organizations. For example, if important transport infrastructures are impacted by construction, coordination costs can be considerable.
In their innovative rehabiliation systems, Obduramus has developed alternative solutions which do not require groundwork as they reliably and permanently seal damage internally. Circum technology works with stainless steel rings which press an EPDM seal against the pipe walls until sealing occurs. Depending on their intended purpose, different sealing processes and diameters are available. This means that damaged pipes can be repaired within a few minutes, instead of within a few days.
Their benefits:
Permanent sealing purely based on the principles of mechanics
Effective and sustainable repairs
Stainless steel sleeve manufactured using the same grade of steel, resulting in no corrosion
Fast and simple installation saves time
Installation with no environmentally harmful lubricants
The stainless steel sleeve with external lock

Quick and sustainable
Trench-free pipe repairs
Our environment, and especially our groundwater, are very sensitive systems which need to be protected. Leaky pipes cause harm which can only be reversed with large amounts of effort. We offer comprehensive solutions for effective and sustainable rehabilitations.
For small and large diameters
Optimum adjustment
Due to its patented lock, which lies flat against the pipe walls, the internal sleeves adapt perfectly to the contours of the internal pipe walls. This ensures minimal cross-sectional reduction in the pipes and prevents passing impediments becoming lodged.

Innovative and efficient
Expert-designed repair system
Customers all over the world value the advantages of Obduramus:
- Fast and simple installation
- Effective and sustainable repairs
- High-quality materials
- Unique, patented external lock
Circum SWELL
predicted launch date in 1st half of 2022
Your pipe repair system experts
Repair pipe connections quickly and effectively
Obduramus Umwelttechnik GmbH is active in the field of environmental engineering and develops and produces solutions for repairing pipe systems. Our products provide solutions for a very diverse range of damage types within pipes.
Tested and certified
Obduramus Circum systems – lasting quality
All our internal sleeves meet the highest standards of quality in terms of material selection, mechanical load capacity and durability. Our Circum MINI and Circum LEM have DIBt approval and DIN leakproofness certification.