Rupertus Strako

What Rupertus Strako does

Rupertus-Strako GmbH is a German specialty industrial services firm founded in 1987 in Bremerhaven, operating as a wholly-owned subsidiary of the Heinrich Rönner Gruppe since the July 2018 merger of Rupertus Korrosionsschutz und Service GmbH with Strako GmbH. The company provides corrosion protection, surface preparation, and industrial coating services across four end markets: shipbuilding (Schiffbau), steel water engineering (Stahlwasserbau), steel construction (Stahlbau), and bridge construction (Brückenbau). Service delivery is split between mobile on-site crews operating at shipyards throughout Germany and stationary facilities at its Bremerhaven headquarters, comprising three large treatment halls (Halle 1: 35×55 m with 2×25 t cranes and an automated continuous blast system handling 50 m / 50 t workpieces; Halle 2 with spray booth; Halle 3: 15×85 m) plus a dedicated 8×9 m glass bead blasting hall for stainless steel and aluminum work.

The underlying technology stack is physical and certified rather than software-driven: dry and wet blast cleaning, high-pressure washing up to 2,800 bar, glass bead blasting, and coating application via airless spray, roller, and brush methods. Mobile fleet assets include 7.5 t trucks, flatbed vehicles, HD washers, grinders, Bristle Blaster, compressors, airless sprayers, and filtration/climate control units. Quality credentials include ISO 9001:2015 (valid through December 2026) and DIN EN ISO 1090-2 up to EXC 4 (valid through March 2027), plus personnel certifications (FROSIO Level III, DIN CERTCO Coating Inspector, KOR-Schein, TRGS 519/521, DGUV 101-004).

The business model is project-based B2B services contracting: revenue is generated from professional services (surface preparation and coating labor) plus a hardware component (industrial coating materials such as paints, primers, and protective coatings sold separately from labor and equipment). Pricing is quote-based per project — no standard price list is published — and payment terms are 14 days net. Go-to-market is sales-led, relying on direct outreach, participation in maritime trade events (e.g., SMM Hamburg), and the cross-company referral network of the Heinrich Rönner Gruppe. Customer mix is enterprise, government/port authority, and heritage/non-profit across Germany with an initial cross-border export project in Le Havre, France. Named customers include bremenports, BREDO DRY DOCKS, Maersk, JadeWeserPort Realisierungs, Glencore, TSU GmbH, Fechner Stahl-und Metallbau, Ludwig Freytag, CAP SAN DIEGO, Alexander von Humboldt II, Schulschiff Deutschland, Museumsschiff Elbe 3, and Nordsee Bagger.

Name

Rupertus Strako

Legal name

Rupertus-Strako GmbH

Website

https://rupertus-strako.de

Company type

Private

Founded year

1987

Operating status

Operating

Headcount range

11–50 employees

Short description

Rupertus-Strako GmbH is a Bremerhaven-based corrosion protection and industrial coating services firm, founded 1987 and part of the Heinrich Rönner Gruppe, serving shipyards, port authorities, infrastructure operators, and industrial clients in Germany with mobile on-site crews and stationary blast/coating facilities.

Ownership category

akta.pro rank

Product category

Industrial Corrosion Protection Services

NAICS

Coating, Engraving, Heat Treating, and Allied Activities (33281), Metal Coating, Engraving (except Jewelry and Silverware), and Allied Services to Manufacturers (332812)

SIC

Coating, Engraving & Allied Services (3470)

akta.pro primary industry

Surface Preparation, Coatings & Corrosion Control (Blasting, Painting, Anti-fouling) (IMAJAFAF)

akta.pro secondary industries

Marine Coatings, Blasting & Corrosion Control (Hull, Tanks, Cathodic Protection) (TLAHAMAG), Tank, Pipeline & Marine Coating Services (Lining/Wrapping) (IMAIAKAJ), Corrosion Control & Asset Integrity Services (Cathodic Protection/Coatings QA) (IMAIACAK)

Keywords

• Corrosion protection services
• Industrial coatings
• Surface treatment
• Ship surface protection
• Steel structure coating

Headquarters

HQ city

Bremerhaven

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Marketing or Sales

Revenue model

1. Project-Based Corrosion Protection and Coating Services: Services are contracted on a project-by-project basis. Pricing follows unit-based or project-based quotations. Payment terms are 14 days net from invoice date. Revenue is derived from surface preparation (blasting, washing), coating application, and related corrosion protection services performed on-site at shipyards or in stationary facilities.
2. Industrial Coating Materials Supply: Sale of industrial coating materials (paints, primers, protective coatings) as part of project contracts. Materials are priced separately from labor and equipment.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Rupertus-Strako GmbH provides industrial corrosion protection and surface treatment services, including sandblasting, glass bead blasting, primer and topcoat application, and full coating system delivery for metallic structures. Operations are delivered via stationary facilities in Bremerhaven and mobile on-site units deployed at client locations such as shipyards, ports, and construction sites. The company serves shipbuilding, steel water engineering, steel construction, and bridge construction clients.

Product overview

Rupertus-Strako GmbH is a corrosion protection services company established in 1987, operating as a single unified service provider rather than a platform-based product. The company offers a comprehensive portfolio of corrosion protection services including blasting work, surface preparation, and coating applications. The core offering combines mobile corrosion protection services delivered on-site at customer locations and stationary services performed in the company's own facilities (Halls 1-3, Glass Bead Hall). Services are organized across four main sectors: Shipbuilding (Schiffbau), Steel Water Engineering (Stahlwasserbau), Steel Construction (Stahlbau), and Bridge Construction (Brückenbau). The company operates as part of the Heinrich Rönner Gruppe and holds certifications including ISO 9001:2015 and DIN EN ISO 1090-2.

Differentiator

Problem solved

Functional benefit

Products and services

• Industrial corrosion protection and coating services End-to-end corrosion protection services for shipbuilding, steel water engineering, steel construction, and bridge construction clients, encompassing surface preparation, primer and topcoat application, and full coating system delivery.

Quantifiable outcome

• 150–180 ships restored per year
• +3 more outcomes

Named customers14 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Nine partnerships are on record, tiered major, minor and core.

• TSU GmbHmajorStrategic or Co-development Partner · 9 May 2026TSU GmbH served as main contractor on the Klappbrücke Schleusenstraße bridge restoration project in Bremerhaven. Rupertus-Strako performed sandblasting and preservation work as a subcontractor. Both companies are subsidiaries of the Heinrich Rönner Gruppe.
• BVT Chartering und Logistics GmbHmajorStrategic or Co-development Partner · 9 May 2026BVT Chartering & Logistics handled the transport of the counterweight and balance beam of the Klappbrücke Schleusenstraße via pontoon, tug, and floating crane. Also transported the museum ship Elbe 3 to BREDO DRY DOCKS. Both companies are subsidiaries of the Heinrich Rönner Gruppe.
• BREDO DRY DOCKSmajorStrategic or Co-development Partner · 9 May 2026BREDO DRY DOCKS operates the dry docking facilities in Bremerhaven where Rupertus-Strako frequently performs corrosion protection work. Projects include Elbe 3, CAP SAN DIEGO, FMS Gera, and Maersk vessels. Both companies are subsidiaries of the Heinrich Rönner Gruppe.
• USM (subsidiary of Heinrich Rönner Gruppe)minorStrategic or Co-development Partner · 1 October 2025USM participated in the Kennedy Bridge stem gate restoration project, handling intermediate handling on Rupertus-Strako's premises as part of a five-company group collaboration.
• Heinrich Rönner GruppecoreStrategic or Co-development Partner · 1 July 2018Rupertus-Strako GmbH became a subsidiary of the Heinrich Rönner Gruppe in July 2018 following the merger of Rupertus Korrosionsschutz und Service GmbH and Strako GmbH. The group comprises multiple companies including BREDO DRY DOCKS, BVT Chartering & Logistics, TSU, USM, RVG, SBN, EnPro, GSR, and MuH, enabling integrated project delivery across maritime, steel, and logistics services.
• Museumsschiff Gera (Museum Ship Gera)minorOthersRupertus-Strako completed cleaning and preservation of the 60-year-old museum fishing vessel FMS Gera at BREDO Dockgesellschaft. Detailed project reports were published on the museum's website.
• WAB (Windenergie Agentur Bremerhaven)minorGTM or Marketing PartnerWAB organized the WINDFORCE 2021 Conference in cooperation with Rupertus-Strako as host. The event brought together representatives from wind industry, maritime sector, government, and science.
• JadeWeserPort Realisierungs GmbH & Co. KGmajorOthersClient for the JadeWeserPort new construction project in Wilhelmshaven. Rupertus-Strako coated approximately 50,000 tonnes of steel sheet piles, fender pipes, and foundation pipes (approx. 250,000 m² surface area) for this major port infrastructure project.
• bremenports GmbHmajorOthersOperator of Bremen and Bremerhaven port infrastructure. Client for Kaiserschleuse Bremerhaven new construction (38,000 t steel, 150,000 m² coating) and Klappbrücke Schleusenstraße bridge restoration.

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Others

• Sika AG: Swiss specialty chemicals company with a strong protective and industrial coatings portfolio (SikaCor, Sikagard systems used in Rupertus-Strako projects). Functions as a key coatings supplier to Rupertus-Strako and as a broader competitor in industrial coating services globally.
• EUROGATE GmbH & Co. KGaA: Major European container terminal operator and port logistics provider with adjacent ship repair and marine service interests. Useful as a customer comparable (port infrastructure operator like bremenports) and potential customer/procurement channel for port-side coating contracts.

Broad incumbents

• Kaefer Group: One of the largest European industrial services firms offering insulation, surface treatment, and corrosion protection for shipbuilding, offshore, and industrial clients. Much larger scale and broader service portfolio, but overlapping in core marine coating and steel protection work.
• Hempel A/S: Danish-headquartered global marine and protective coatings manufacturer with extensive certified applicator network in European shipyards. Comparable target market (shipyards, offshore, infrastructure) but operates primarily as a coatings supplier with indirect service competition.
• Jotun A/S: Norwegian-headquartered global marine and protective coatings supplier with shipyard applicator programs. Comparable customer base (Maersk, naval, offshore) and a known coating specifier on port and bridge infrastructure projects overlapping with Rupertus-Strako's service scope.
• International Paint (AkzoNobel Marine Coatings): Global marine coatings manufacturer and applicator network. Competes indirectly as a coating supplier and through certified applicator programs. Distinct in being a coatings manufacturer rather than pure service provider, but its Baltoflake product was specified in Rupertus-Strako's Le Havre project.

Regional players

• Remmers GmbH: German manufacturer of specialty coatings, sealants, and surface protection systems with strong presence in industrial corrosion protection, steel construction, and bridge preservation. Comparable customer overlap (Stahlbau, Brückenbau) but operates primarily as a coatings manufacturer rather than applicator.

Direct peers

• Muehlhan AG: German-headquartered global provider of surface protection, coatings, and industrial services for marine, oil & gas, and infrastructure customers. Direct competitor to Rupertus-Strako in ship repair coatings and steel structure corrosion protection, with a similar mobile + stationary service model.
• Hydrex NV: Belgian-headquartered specialist in underwater hull cleaning, repair, and surface treatment for commercial and naval vessels. Comparable niche specialist profile to Rupertus-Strako's marine corrosion protection business, with overlapping target customers (ship operators, cruise lines, navy).
• TIKAL GmbH: German Korrosionsschutz service provider specializing in industrial and maritime corrosion protection, surface treatment, and coating application. Closely comparable niche player to Rupertus-Strako in the German Mittelstand industrial services market.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

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 Rupertus Strako