
Manufacturer of impregnated joint sealing strips as well as insulating, hydrophobic, and conductive synthetic soft foams
Hanno Werk GmbH & Co. KG
Laatzen (Hanno-Ring 3-5, 30880) · Sissach (Gewerbestrasse 10, 4450, Hanno (Switzerland) AG)New on Amplifa
About HANNO
Hanno Werk GmbH & Co. KG was founded in 1895 as Hannoversche Filzfabrik M. Mehlhard and has evolved from felt production to a manufacturer of sealing and insulation systems made from technical soft foams. The company confections polyurethane soft foams and uses self-adhesive technology; today's main focuses are impregnated joint sealing strips as well as insulating, hydrophobic, or conductive synthetic soft foams. The product range includes joint sealing strips, multi-function and foil strips, impregnated foam, PU-polyether and polyester foams, PE foams, cellular rubber (EPDM/CR), melamine resin foam, non-wovens, ballast layers, and combination elements for applications in sealing, insulation, damping, and isolation. In-house research and development, supported by laboratories and test benches, accompanies application engineering, consulting, training, and construction phase support; furthermore, tender documents, detailed drawings, and BIM data are provided. Production takes place in Laatzen (Germany); via Hanno (Switzerland) AG in Sissach, the company supplies customers in the construction and industrial sectors, including window and façade construction, mechanical engineering, automotive and railway vehicle construction, medical technology, as well as energy, climate, and ventilation technology.
- Site
- Laatzen
- Processes
- Confection of polyurethane soft foams, Self-adhesive technology (Confection), Felt production (historic origin of the company), Research and development with in-house laboratories and test benches, Manufacturing of sealing and insulation systems, Research & development with in-house laboratories and test benches, Application engineering and consulting, Training and construction phase support
- Materials
- Polyurethane (PU) Polyether Foam, Polyurethane (PU) Polyester Foam, Polyurethane (PU) Composite Foam, Polyurethane (PU) Filter Foam, Polyethylene (PE) Foam, Melamine Resin Foam, Cellular Rubber (EPDM/CR), Polyester Non-woven
- Certificates
- DIN EN ISO 14001:2015, ecobau/Minergie-ECO Rating Hannoband-BG1, ecobau/Minergie-ECO Rating Hannoband-3E, ecobau/Minergie-ECO Rating Hanno Foil Strip-DUO Easy, ISO 14001, ecobau/Minergie-ECO
- Founded
- 1895
- Industries
- Window Construction, Façade Construction, Mechanical Engineering, Automotive Construction, Railway Vehicles, Electronics & Transport
- 01
Research and development with in-house laboratories and test benches
- 02
Foam selection and material development (PU, PE, melamine resin, cellular
- 03
Impregnation of the foams
- 04
Confection of polyurethane soft foams
- 05
Self-adhesive technology (tape application/confection)
- 06
Final inspection and quality assurance
- 07
Application engineering, consulting, training, and construction phase support
Sites

Laatzen
DECompany headquarters and production (Hanno Werk GmbH & Co. KG)
- Materials
- PU foams, PE foam, melamine resin foam, cellular rubber, polyester non-woven

Sissach
CHSales and application location Switzerland (Hanno (Switzerland) AG)
Products and Components



Inside the production




Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Confection of polyurethane soft foamsPlastic | – | – | – | – | Polyurethane (PU) Polyether Foam, Polyurethane (PU) Polyester Foam |
| Self-adhesive technology (Confection)Plastic | – | – | – | – | Polyurethane (PU) Foam |
| Felt production (historic origin of the company)Plastic | – | – | – | – | – |
| Research and development with in-house laboratories and test benchesTesting | – | – | – | – | – |
| Manufacturing of sealing and insulation systemsPlastic | – | – | – | – | Polyurethane (PU) Foam, Polyethylene (PE) Foam, Melamine Resin Foam, Cellular Rubber, Polyester Non-woven |
Additional services
Quality and Certificates
The production of sealing and insulation systems is certified according to DIN EN ISO 14001; in-house laboratories and test benches in research and development ensure product testing. ecobau/Minergie-ECO ratings are available for building products until January 2028.
| Evidence | Laatzen |
|---|---|
| ISO 14001 | |
| ecobau/Minergie-ECO |
History
- 1895
Founded as Hannoversche Filzfabrik M. Mehlhard
Expansion from felt production to confection of polyurethane soft foams and self-adhesive technology; today's main focuses: impregnated joint sealing strips and insulating, hydrophobic or conductive synthetic soft foams