
Development and manufacture of multi-component rubber and plastic sealing systems for the automotive, construction and electrical industries

GTG Gummitechnik Wolfgang Bartelt GmbH & Co. KG
Gundelfingen a. d. Donau (Plant I, II, III)New on Amplifa
About GTG Gummitechnik
GTG Gummitechnik Wolfgang Bartelt GmbH & Co. KG is a family-owned company headquartered in Gundelfingen an der Donau and develops and manufactures rubber and plastic sealing systems for the automotive, electrical as well as façade and window construction industries. The value chain covers the extrusion of mono, co- and triplex profiles made of EPDM and plastics, in-house profile tooling from the company's own toolmaking shop, vulcanized corner joints and mixed frames, as well as injection molding with clamping forces from 200 to 4000 kN for mono and two-component articles. In addition, profiles are painted and flocked, further processed and integrated into complete assemblies through systems engineering. Materials used include EPDM, CR, NBR, silicone, TPE, TPV, PE, PA, POM, PP and ABS with hardness levels from 25 to 95 Shore A. The company flexibly switches from micro to large series and manufactures prototypes as well as customer-specific special solutions. For more than 40 years, leading manufacturers from all over Europe have been supplied by GTG.
- Site
- Gundelfingen a. d. Donau
- Processes
- Extrusion of profiles (mono, co- and triplex profiles), Vulcanization of frames (corner joints, mixed frames, connecting elements), Injection molding (mono and two-component articles, membranes, buffers, sealing frames, sealing, Systems engineering (integration of individual components into assemblies/sealing systems), Painting of profiles, Flocking of profiles, Post-processing of extrusion profiles, Toolmaking (in-house toolmaking for profile geometries)
- Materials
- EPDM, CR, NBR, Silicone, TPE, TPV, PE, PA
- Certificates
- IATF 16949:2016 (with product development), ISO 9001:2015 (Plant 2), ISO 9001:2015 (Plant 1), RSCI Label (Full Label, 100/100), TISAX (Scope SNW2ZL, protection of prototype parts), ISO 9001, IATF 16949, TISAX, RSCI, ISO 14001
- Industries
- Automotive, Construction / Façade and Window Construction, Electrical / Household Appliances, Construction/Façade and Window Construction, Electrical/Household Appliances
- 01
Design / Product Development
- 02
Toolmaking
- 03
Extrusion (Mono, Co- and Triplex Profiles)
- 04
Joining Technology (Vulcanization of Frames)
- 05
Injection Molding
- 06
Post-Processing
- 07
Painting / Flocking
- 08
Systems Engineering / Assembly
Locations

Gundelfingen a. d. Donau – Industriestraße 8-10 (Plant I / Headquarters)
DEHeadquarters, development, construction & industry, ISO 9001 (DEKRA), TISAX
- Lot size
- Micro to large series
- Materials
- EPDM, plastics
- Extrusion lines
- Post-processing centers
- Painting systems
- Flocking systems

Gundelfingen a. d. Donau – Peterswörther Str. 4 (Plant II)
DEPlant for automotive, IATF 16949 and ISO 9001 (DQS)
- Lot size
- Micro to large series
- Materials
- EPDM, CR, NBR, silicone, TPE, TPV, PE, PA, POM, PP, ABS
- Injection molding machines 200–4000 kN

Gundelfingen a. d. Donau – Günzburger Str. 71 (Plant III)
DEVisitor address and administrative functions
Components




Inside the production




Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Extrusion of profiles (mono, co- and triplex profiles)Plastics | – | – | – | – | EPDM, Plastic |
| Vulcanization of frames (corner joints, mixed frames, connecting elements)Joining | – | – | – | – | EPDM, Silicone |
| Injection molding (mono and two-component articles, membranes, buffers, sealing frames, sealingPlastics | – | – | – | – | EPDM, CR, NBR, Silicone, TPE, TPV, PE, PA, POM, PP, ABS |
| Systems engineering (integration of individual components into assemblies/sealing systems)Assembly | – | – | – | – | – |
| Painting of profilesSurface | – | – | – | – | – |
| Flocking of profilesSurface | – | – | – | – | – |
| Post-processing of extrusion profilesMachining | – | – | – | – | EPDM, Plastic |
| Toolmaking (in-house toolmaking for profile geometries)Machining | – | – | – | – | – |
| Development of material combinations and sealing systems (product development)Engineering | – | – | – | – | Rubber, Plastic |
| Manufacture of sealing systems (doors, flaps, lids, window guides, façade profiles)Plastics | – | – | – | – | EPDM, Silicone, Composites |
5 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Injection molding machines | – | – | Clamping force 200 kN to 4000 kN | – | Gundelfingen a. d. Donau |
| Extrusion lines | – | – | – | – | Gundelfingen a. d. Donau |
| Post-processing centers | – | – | – | – | Gundelfingen a. d. Donau |
| Painting systems | – | – | – | – | Gundelfingen a. d. Donau |
| Flocking systems | – | – | – | – | Gundelfingen a. d. Donau |
Additional services
Quality and Certification
GTG operates a TQM system in accordance with IATF 16949:2016 as well as quality management systems certified to ISO 9001:2015 for both plants. Production is designed to be transparent, so customers can follow every work step from development to the end product.
| Evidence | Plant II (Peterswörther Str.) | Plant I (Industriestraße 8-10) |
|---|---|---|
| ISO 9001 | ||
| IATF 16949 | ||
| TISAX | ||
| RSCI | ||
| ISO 14001 |
History
- 2012
Awarded the Automotive Award 2012
- 2014
For more than 40 years, trusted by leading manufacturers from the electrical, automotive and façade construction industries from all over Europe
- 2024
Received the RSCI Full Label (100/100) and successfully completed TISAX assessment cycles