Seal of Quality 2020: These companies have been awarded
A new record: 25 companies in Germany and the Netherlands were awarded the CIPP seal “Tested Quality” by Siebert + Knipschild this year. The testing institute has been awarding this seal to CIPP contractors for five years – the number of seal holders has reached an all-time high in 2020. Only companies that have achieved excellent test results with a CIPP liner system over a period of one year are awarded the coveted seal.
| Company | System/ Manufacturer |
| Aarsleff Rohrsanierung GmbH | PAA-SF-Liner PAA-G-Liner iMPREG-Liner GL16 |
| AKS Umwelttechnik GmbH | Brandenburger Liner BB 2.5 |
| Arkil Inpipe GmbH | Berolina Liner |
| Berndt Rohr- und Kanalservice GmbH | Berolina Liner |
| Dipl. Ing. H. Bendl GmbH & Co. KG | SAERTEX-LINER® Typ M SAERTEX-LINER® Typ S+ |
| Diringer & Scheidel Rohrsanierung GmbH & Co. KG | SAERTEX-LINER® Typ S+ SAERTEX-LINER® Typ M |
| Erles Umweltservice GmbH | iMPREG®-Liner GL16 |
| Fleer-Tech GmbH | RS CityLiner® |
| Frisch & Faust Tiefbau GmbH | Alphaliner 500G |
| Geiger Kanaltechnik GmbH & Co. KG | Alphaliner 500G |
| GMB Riooleringstechnieken B.V. | SAERTEX-LINER® Typ M |
| Huneke Kanalsanierung GmbH | SAERTEX-LINER® Typ M |
| Insituform Rioolrenovatietechnieken B.V. | Insituform GF-Liner |
| kan.d.i.s Kanaltechnologie GmbH | SAERTEX-LINER® Typ S+ |
| KATEC – Kanaltechnik Müller & Wahl GmbH | Alphaliner 500G |
| LTS Lilie Tief- und Straßenbau GmbH | SAERTEX-LINER® Typ M |
| Rainer Kiel Kanalsanierung GmbH | SAERTEX-LINER® Typ M SAERTEX-LINER® Typ S+ |
| Rohr Frei Schnelldienst Axel Zimmerbeutel GmbH | RS MaxLiner® Flex S |
| Rohrsanierung Jensen GmbH & Co. KG | Alphaliner 500G |
| Sanierungstechnik Dommel GmbH | Alphaliner 500G |
| STRABAG AG Berlin (Direktion Nordost) | Alphaliner 500G |
| STRABAG AG Österreich | Brandenburger Liner BB 2.5 |
| Swietelsky – Faber GmbH Kanalsanierung | SAERTEX-LINER® Typ M |
| tubus GmbH Leipzig | iMPREG-Liner GL16 Brandenburger Liner BB 2.5 |
| Werner Vollert GmbH & Co. KG | Alphaliner 500G |















