Stoz

What Stoz does

Stoz GmbH is a privately held, family-owned German industrial coating company headquartered in Rottenburg-Hailfingen, Baden-Württemberg, operating continuously since 1926 and currently in its fourth generation of family management. The company provides development, pre-treatment, coating, and fabrication/assembly services to B2B customers across six vertical end markets: automotive, industrial technology, aerospace and defense, railroad, sanitary technology, and general industry.

Its core technology spans the full surface-treatment stack. Pre-treatment capabilities include wet-chemical processes (silane, titanium zirconium, chromium III, zinc phosphate, organic sealants) delivered through 34 dip tanks in cyclic immersion systems, plus fluorination, flame treatment, CO2 blasting, laser cleaning, and a vacuum power-wash system rated at up to 5,000 small parts per hour. Coating is applied via 13 painting systems and 10+ robot-controlled or manual lines, using wet paints (solvent or water-based) from all major manufacturers on metal and plastic substrates. Four registered proprietary brands anchor the product portfolio: LYMA® (chemical pre-treatment), EPOTEC® (functional high-performance coatings), OPTICOLOR® (decorative surfaces), and DURAFLON® INDUSTRIE (fluoropolymer coatings). An in-house laboratory performs ISO- and DIN-accredited quality testing including coating thickness (ISO 2360, ISO 2178), salt spray (DIN EN ISO 9227), condensation climate (ISO 6270-2 CH), spectrophotometry, gloss measurement, and fluorescence-based cleanliness testing.

Stoz generates revenue through project-based B2B contract manufacturing, with quote-based pricing dependent on component specifications, materials, coating type, and volume. Go-to-market is direct enterprise field sales through the company website, email, and telephone, with no disclosed third-party distribution. At 60+ employees producing 40,000+ parts per day, the company operates as a capital-intensive Mittelstand specialist whose competitive position rests on accumulated process expertise, proprietary brand identity, and a broad installed asset base rather than on disclosed financials, external capital, or geographic scale.

Name

Stoz

Legal name

Stoz GmbH

Website

https://stoz.gmbh

Company type

Private

Founded year

1926

Operating status

Operating

Headcount range

51–100 employees

Short description

Stoz GmbH is a fourth-generation family-owned German industrial coating company, founded in 1926, providing pre-treatment, coating, and assembly services to B2B customers across automotive, aerospace, defense, railroad, sanitary, and general industry verticals from its Rottenburg-Hailfingen facility.

Ownership category

akta.pro rank

Product category

Industrial Surface Coating Services

NAICS

Coating, Engraving, Heat Treating, and Allied Activities (3328), Paint and Coating Manufacturing (32551)

SIC

Coating, Engraving & Allied Services (3470), Paints, Varnishes, Lacquers, Enamels & Allied Prods (2851)

akta.pro primary industry

Industrial Protective Coatings (Steel/Concrete/Equipment) (IMAIAKAB)

akta.pro secondary industries

Industrial Protective Coatings (IMAEAHAB), Specialty & Functional Coatings (Anti-microbial/Anti-slip/Insulating) (IMAIAKAM)

Keywords

• Industrial surface coating
• Pre-treatment services
• Corrosion protection coatings
• Fluoropolymer coatings
• Functional decorative coatings

Headquarters

HQ city

Rottenburg

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Supply Chain, Marketing or Sales

Revenue model

1. Industrial Coating Services: B2B contract manufacturing for industrial surface treatment including development, pre-treatment, coating, and fabrication/assembly services. Revenue generated through project-based contracts with enterprise customers across multiple industries.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Stoz GmbH is an industrial surface coating company that develops, pre-treats, coats, and assembles metal and plastic components for enterprise customers across automotive, aerospace, defense, railroad, industrial technology, and sanitary industries. The company operates four proprietary coating brands (LYMA®, EPOTEC®, OPTICOLOR®, DURAFLON® INDUSTRIE) backed by 13 painting systems, 10+ robot systems, 34 dip tanks, and an in-house quality testing laboratory, painting 40,000+ parts daily.

Product overview

Stoz GmbH is an industrial coating company offering a portfolio of four proprietary brands: LYMA® (chemical pre-treatment technology), EPOTEC® (high-performance functional coatings), OPTICOLOR® (decorative surface coatings), and DURAFLON® INDUSTRIE (fluoropolymer coatings). These brands are supported by integrated services including surface development, pre-treatment (wet-chemical, fluorination, laser, CO2 blasting), industrial paint application via robot or manual systems, and fabrication/assembly. The company operates 13 painting systems and 34 dip tanks for customised coating solutions across industries including automotive, aerospace, railroad, and general industry since 1926.

Differentiator

Problem solved

Functional benefit

Brands

• LYMA®: Pre-treatment technology with chemically applied layers - products and processes from pre-treatment technology with chemically applied coatings.
• EpoTEC®
• Opticolor®
• DURAFLON® INDUSTRIE

Products and services

• LYMA® Proprietary pre-treatment technology featuring chemically applied layers for industrial coatings. Provides chemical pre-treatment solutions for metal and plastic components, serving industrial customers requiring consistent surface preparation prior to painting.
• EPOTEC® Proprietary high-performance functional coatings that emphasise technical character and are matched to various substrates for industrial applications requiring durability and performance. For industrial buyers needing functional surface protection.
• OPTICOLOR® Proprietary decorative surface coating for metal and plastic parts with special visual and tactile properties, enabling appealing aesthetics across various substrates. Targeted at manufacturers needing decorative finishes (e.g., sanitary fittings).
• DURAFLON® INDUSTRIE Proprietary fluoropolymer coating system delivering exceptional properties and optical brilliance for industrial applications, providing consistent and attractive surface finishes based on fluoropolymers.
• Development Services Customised surface development services working with customers, suppliers, equipment manufacturers, and research organisations to create tailored coating solutions for specific project requirements, from development through series production.
• Pre-treatment Services Wet-chemical pre-treatment of metals and plastics including clock diving (cyclic immersion) systems, power wash systems, fluorination, flame treatment, CO2 blasting, and laser cleaning for optimal surface preparation before coating.
• Industrial Coating/Paintwork Services Technical and optical surface coating services using wet paints from all manufacturers (solvent or water-based) on all common substrates, applied via fully automated robot systems or traditional hand-painting methods. Includes painting of 40,000+ parts daily.
• Fabrication and Assembly Services Comprehensive post-coating services including procurement of raw materials, component assembly, product customisation, flexible packaging solutions, and pre-assembly, intermediate, and final assembly work as a single-source provider.

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature10 records

Scale indicators8 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Aalberts Surface Technologies: European-listed industrial surface treatment group providing coatings, heat treatment, and specialised surface engineering across multiple sectors. Comparable to Stoz for industrial surface treatment services across automotive, aerospace, and general industry, though Aalberts operates at significantly larger scale and geographic breadth.
• Glasurit (BASF Coatings): BASF's automotive and industrial refinish coatings brand with extensive OEM presence in Germany. Comparable to Stoz for automotive-grade coatings expertise and German industrial customer base, though Glasurit is part of a global chemical major rather than an independent applicator.
• Dürr AG: German global leader in painting and finishing systems, with a dedicated Industrial Paint Technology division. Directly comparable as a major European industrial coating solutions provider, though Dürr is significantly larger, publicly listed, and also supplies the equipment itself rather than only contract coating services.
• Oerlikon Balzers (Oerlikon Surface Solutions): Swiss-listed global surface solutions provider offering PVD, PACVD, and other advanced coatings for automotive, aerospace, and tooling customers. Comparable to Stoz for premium industrial coating services to high-spec industries, though Oerlikon is publicly listed, global, and focused on physical vapour deposition rather than wet paint.

Direct peers

• FreiLacke (Emil Frei GmbH & Co. KG): German family-owned industrial coatings manufacturer and applicator with a broad portfolio of wet paints, powder coatings, and functional coatings. Comparable to Stoz as a German industrial coatings specialist serving similar B2B industrial customers with comparable product breadth.
• Karl Wörwag Lack- und Farbenfabrik GmbH & Co. KG: German family-owned industrial coatings manufacturer with proprietary brands (Wörwag) supplying functional and decorative coatings to industrial customers. Comparable to Stoz for German mid-market industrial coatings specialism, family ownership, and proprietary brand-led positioning.
• Mankiewicz Gebr. & Co. (GmbH & Co. KG): German industrial coatings manufacturer with proprietary brands serving aerospace, automotive, and general industry. Comparable to Stoz for premium functional coatings offering and German mid-market industrial customer base, though Mankiewicz is a paint producer rather than applicator.
• Hemmelrath Lackfabrik GmbH: German manufacturer of industrial coatings with strong focus on automotive OEM and tier-supplier customers. Comparable to Stoz for automotive coatings expertise, though Hemmelrath is primarily a paint producer rather than a contract applicator.
• Walter Wurdack GmbH: German surface finishing specialist offering industrial coating, lacquering, and printing on plastics and metals. Closely comparable to Stoz as a medium-sized German contract surface finisher serving industrial customers with multi-substrate capabilities.

Regional players

• Bodycote plc: UK-listed global thermal processing and surface treatment services provider with strong European automotive and aerospace exposure. Comparable to Stoz as a B2B industrial surface treatment service provider, though Bodycote focuses on heat treatment and hot isostatic pressing rather than wet-paint coating.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/stoz

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Stoz