
Development, production and filling of cleaning, polishing and sealing agents for high-quality vehicles
J. Zürn, ROTWEISS Produkte
Wasserburg (Bodensee), Sandgraben 8New on Amplifa
About ROTWEISS
ROTWEISS Produkte (J. Zürn) has been developing, producing and filling chemical care products for vehicle surface care since 1937. The product range covers cleaning, polishing and sealing for paint, GRP, gelcoat, carbon, acrylic glass/PLEXIGLAS®, polycarbonate, metals such as stainless steel, aluminium and brass, as well as plastics, rubber, leather and glass. Core products are polishing pastes and abrasive and polishing compounds – including the synthetic resin polishing paste developed since 1956 – supplemented by cleaners, sealants, and accessories such as polishing sponges, microfibre cloths and care kits for cars/trucks, boats and yachts, caravans, motorcycles/bicycles and aircraft. Products are developed, tested, produced, filled and distributed in-house at the Wasserburg (Lake Constance) site via factory outlet, specialist retailers, workshops and the online shop. The main sales territory is the German-speaking region, complemented by a cooperation partner in Chengdu (China).
- Site
- Wasserburg (Bodensee)
- Processes
- Polishing of paint surfaces, Polishing of acrylic glass / PLEXIGLAS® (PMMA), Polishing of polycarbonate (MAKROLON®, LEXAN®), Polishing of stainless steel, Machine polishing with rotary/dual-action polisher, Cleaning of vehicles and surfaces (paint, GRP, gelcoat, carbon, metals, plastics), Sealing of surfaces (paint, GRP, gelcoat, metal, plastic), Smart repair (paint treatment / scratch removal)
- Materials
- PMMA (acrylic glass, PLEXIGLAS®), PC (polycarbonate, MAKROLON®, LEXAN®), GRP, Gelcoat, Carbon (CFRP), Paint, Stainless steel, Aluminium
- Certificates
- ISO 9001
- Founded
- 1937
- Industries
- Vehicle care/detailing, Chemical products, Specialist retailers and workshops, Boat and yacht accessories, Caravan/motorhome equipment, Aviation
- 01
Product development and testing
- 02
Production of care products
- 03
Filling
- 04
Warehouse and factory outlet
- 05
Distribution via specialist retailers, workshops and online shop
- 06
Training and application support
Materials and Applications
PMMA (acrylic glass, PLEXIGLAS®)
Scratch-sensitive transparent plastic surfaces, e.g. on motorhomes, boats and aircraft, are treated with special polishing compounds and cleaners.
PC (polycarbonate, MAKROLON®, LEXAN®)
Impact-resistant thermoplastic surfaces are treated with matched polishing and cleaning products.
GRP and gelcoat
Cleaning, polishing and sealing of GRP and gelcoat surfaces on boats, yachts and caravans.
Carbon (CFRP)
Special polishing pastes and sealants preserve the surface structure of carbon surfaces without a grey film.
Paint
Smart repair, polishing and sealing of clear coat surfaces, including scratch-resistant and dark paints.
Stainless steel
Cleaners and polishes for the care and sealing of stainless steel surfaces.
Aluminium
Aluminium polish as well as stainless steel and aluminium care for streak-free cleaning and corrosion protection.
Brass
Special brass polish for cleaning and treating brass surfaces.
Plastic and rubber
Deep care, colour refreshment and sealing for plastic and rubber parts indoors and outdoors.
Leather
Deep cleaner and care lotion for smooth and synthetic leather.
Glass
Surface and glass cleaners for streak-free routine cleaning of glass, mirrors and high-gloss decorative surfaces.
Site
Wasserburg (Bodensee)
DEProduction, administration, factory outlet, warehouse
- Materials
- Cleaning, polishing and sealing agents
Products







Inside the production








Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Polishing of paint surfacesSurface | – | – | – | – | Paint, GRP, Gelcoat, Carbon |
| Polishing of acrylic glass / PLEXIGLAS® (PMMA)Surface | – | – | – | – | PMMA (acrylic glass, PLEXIGLAS®) |
| Polishing of polycarbonate (MAKROLON®, LEXAN®)Surface | – | – | – | – | PC (polycarbonate, MAKROLON®, LEXAN®) |
| Polishing of stainless steelSurface | – | – | – | – | Stainless steel |
| Machine polishing with rotary/dual-action polisherSurface | – | – | – | – | Paint, GRP, Gelcoat, PMMA, PC, Carbon, Metal |
| Cleaning of vehicles and surfaces (paint, GRP, gelcoat, carbon, metals, plastics)Surface | – | – | – | – | Paint, GRP, Gelcoat, Carbon, Metals, Plastics, Glass |
| Sealing of surfaces (paint, GRP, gelcoat, metal, plastic)Surface | – | – | – | – | Paint, GRP, Gelcoat, Metal, Plastic, Carbon, Glass, Aluminium, Stainless steel |
| Smart repair (paint treatment / scratch removal)Surface | – | – | – | – | Paint, GRP, Gelcoat |
| Development, production and filling of care productsEngineering | – | – | – | – | – |
Additional services
Quality
Product quality is continuously monitored; products are tested and tried on vehicles in our own development. Customers receive training, tutorials and personal application support.
| Evidence | Wasserburg (Bodensee) |
|---|---|
| ISO 9001 |
History
- 1937
Founding of the company 'Adolf Weiss - Chemische Produkte'; production of floor waxes, wax shavings and polishes.
- 1956
Development of the synthetic resin polishing paste, known as 'Polierpaste' since 1998; the formulation remains virtually unchanged.
- 1979
Adolf Weiss sells the company to Josef Zürn sen., who continues the business with his wife Mafalda Zürn.
- 1995
Move to the new production facility in Wasserburg, Sandgraben 8; in-house development, testing, production and filling.
- 1996
Company management by Josef Zürn Jun. and Petra Zürn, both graduate engineers in chemistry.
- 2006
Doubling of warehouse space through an extension to the production facility.
- 2013
Opening of a cooperation partner in Chengdu, China; the German-speaking region remains the main sales territory.
- 2024
Dominic Zürn joins the business; succession secured.