Coatings with 210+ RAL colours.

At Gronbach, we coat a wide variety of components such as sheet metal, moulded parts, furniture attachments and profiles from sheet material and extruded profiles in our own powder coating plant. The portfolio includes more than 210 RAL shades in different structures and gloss levels, which we supply just-in-time.
Powder-coated surfaces offer optimum protection against high temperatures, chemical and weathering influences, corrosion and UV light.


Processes in manufacturing.

  • Powder coating
  • Alternative methods of refinement

Supplier powder coating of stainless steel

In powder coating, electrostatically charged powder is sprayed onto the production part and then burned into the material at high temperatures.

We use polyurethane, polyethylene, epoxy and mixed powder types in easy-to-clean, hot grease powder and standard variants.

  • Different gloss levels and metallic effects
  • Optimum edge coverage
  • Job-lot orders as well as small and large series production
  • Max. processing sizes: up to approx. 180 x 140 cm

Metal refining process

Mechanical finishing

We can grind, brush, polish or blast metal surfaces to a wide range of degrees of fineness. Turning or milling the metals is also possible. Due to the automated, robot-controlled treatment of the surfaces, every processing is 100% reproducible.

  • Brushing, grinding
  • Blasting
  • (Laser) polishing


Supplier, manufacturer chemical dyeing, chemical anodizing in Germany


We have a factory-owned anodising plant that can support you with the following finishing processes:

  • Organic or electrolytic anodisation
  • Partial / selective anodising
  • Anodising of already back-moulded components

In addition, various forms of pre- and post-treatment are possible, for example brushing, grinding, blasting, polishing, special pickling and lasering.


Laser, printing and etching processes

For the visual labelling of functional components and other products, e.g. with logos, symbols or lettering, we use various processes for individual decorative and functional coatings:

  • Etching technologies
  • Screen and pad printing
  • Laser marking, laser engraving


Advantages of powder coating.


Abrasion-, scratch-, impact- and shock-resistant surfaces.
Protection against weathering, high temperatures, UV light and corrosion.

According to requirements

Contract manufacturing as well as small and large series production.


Different gloss levels and metallic effects.


Max. processing sizes: up to approx. 180 x 140 cm.

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Further services

Cross elements of metal processing.

The powder coating of stainless steel is one component of our entire service portfolio.
In addition, we fulfil the entire service supply chain – from toolmaking and metalworking to back-moulding with plastics, final assembly and logistics – all from a single source.

  • Component manufacturing
  • Hybrid composites & bonding
  • Injection moulding
  • Toolmaking & assembly

Supplier sheet metal parts and formed parts from sheet metal, e.g. front panels for household appliances

Mechanical metal processing

Aluminium, sheet metal, stainless steel and steel:

  • Bending and forming
  • Turning (CNC), milling (CNC), sawing
  • Presses with up to 500 t clamping force
  • Punching (with or without foil)
  • Grinding and polishing
  • Welding

Manufacturer of metal and plastic components joined together via back molding

Back-injection of metal and metal foils

For the required substructure of metal components and metal foils, we back-inject them with the required plastics.
We design and manufacture the plastic injection moulding tools required for this ourselves in order to avoid distortion due to shrinkage and different linear expansions. Furthermore, we integrate the desired electronics or lighting elements during back injection moulding.


Joining and bonding technologies

We join components using a wide variety of methods. In bonding, we use liquid adhesives, adhesive tapes and also adhesive die-cuts, which we apply manually or robotically. Optionally, different types of pre-treatment are possible, including plasma, primer, scarfing or pyrosil as well as different rapid curing methods (UV light, infrared, heat radiation).

  • 1C adhesives with manual and robot-assisted application
  • 2C adhesives in robot systems with high-end dispensing technology
  • Adhesive tapes with manual or robot-assisted application
  • Punched adhesive substrates with special systems for perfect positioning and pressing

Back molding plastic aluminum, stainless steel, steel and metal foil

Plastic injection moulding

We manufacture a wide range of different products, including fan wheels and components as part of assemblies, in our own plastic injection moulding shop with machines up to 300 t clamping force.
We manufacture the corresponding moulds and injection moulding tools ourselves.


Supplier toolmaking, toolmaker Bavaria

  • Embossing tools
  • Punching tools
  • Multi-cavity tools
  • Progressive dies
  • Injection moulds
  • Transfer tools
  • Forming tools for visible components
  • Devices for handling
  • Testing and measuring devices


Assembly and automation
  • Manual assembly
  • Partially automated assembly of small to medium quantities
  • Fully automated production of large quantities
  • Complete assembly lines incl. safety and function tests
  • Customised assembly lines


Your contact person for powder coating.

Sales Management

Daniel Wolf


+49 8071 9150


Wilhelm Gronbach GmbH
Division Ventilation & Surfaces

Am Burgfrieden 2
D-83512 Wasserburg/Inn


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      • Order volumes
      • [
      • Requests from private individuals
      Order volumes

      Please take into account that our production is geared towards medium to large series production. We are therefore unable to process requests for very small quantities for economic reasons.

      Requests from private individuals

      We ask for your understanding that we cannot consider requests from private individuals of any kind.