What Etandex does

Etandex is a French specialty construction company founded in 1973, headquartered in Courtaboeuf (Essonne), that provides specialized construction services including waterproofing (étanchéité and cuvelage), structural repair and reinforcement, concrete restoration, technical flooring, and anti-corrosion coatings. The company operates through a network of approximately 10 regional branch offices (agences) covering all major French regions plus Monaco, executing more than 1,500 construction projects per year with a workforce of around 1,000 employees. Etandex serves both public-sector clients — including SNCF, EDF, RATP, Aéroports de Paris, Mairie de Paris, Assemblée Nationale, Ministère de la Justice, and the Principauté de Monaco — and private enterprises such as Dassault Aviation, Arcelor Mittal, Pierre et Vacances, and the Bristol Hotel, primarily through direct contracts or as a specialist subcontractor to major construction firms.

The company's core technology is centered on composite resin-based waterproofing and coating systems, including brush-applied crystalline waterproofing, hot-spray projected polyurethane and epoxy resins, structural repair mortars, carbon fiber reinforcement (Renforts Carbone), and specialized resin flooring solutions. Etandex has developed proprietary methods including the Cuvelage Intrados system for underground structure waterproofing (first deployed at SNCF's Gare d'Issy les Moulineaux), TECTOPROOF CA (CSTB ATex Case A certified), hot-spray resin projection with real-time computerized control of ambient conditions, the MIEL software for resin consumption monitoring, and the ARGOS roboticized spraying system (MASE Trophy 2024). The company holds ISO 9001, ISO 19443 (nuclear sector), EDF UTO certification, Qualibat certifications across three waterproofing specializations, and MASE certification.

Etandex generates revenue through project-based contracts for specialized construction services, with pricing determined per-project through technical commercial proposals. Revenue is described as one-time project-based work ranging from small interventions to multi-month major infrastructure projects, sourced from direct contracts with public authorities, municipalities, and state-owned enterprises, plus subcontracting arrangements with major French construction firms (e.g., Eiffage, Solétanche Bachy). The company is privately held as a Société Anonyme (capital €2,134,286) under family/management ownership, with Stéphane Engel serving as PDG since 2007 following the company's independence from the Infra group in 1982.

Name

Etandex

Legal name

ETANDEX

Website

https://etandex.fr

Company type

Private

Founded year

1973

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Etandex is a French specialty construction company founded in 1973 that provides waterproofing, concrete repair, structural reinforcement, and technical flooring services to public-sector clients (SNCF, EDF, RATP, ADP) and private enterprises across France via a network of 10 regional branch offices and ~1,000 employees.

Ownership category

akta.pro rank

Product category

Specialty Construction Services (Waterproofing and Structural Repair)

NAICS

Utility System Construction (2371), Highway, Street, and Bridge Construction (237310), Water and Sewer Line and Related Structures Construction (237110)

SIC

Services-Engineering Services (8711), Water, Sewer, Pipeline, Comm & Power Line Construction (1623)

akta.pro primary industry

Fireproofing & Intumescent Coatings (IMAIAKAH)

akta.pro secondary industries

Bridge Rehabilitation & Structural Strengthening (Deck Replacement, Seismic Retrofit) (IMAFAEAK), Storage & Conveyance Structures (Reservoirs, Tanks, Culverts, Tunnels) (IMAFAGAE)

Keywords

• Specialty construction services
• Waterproofing systems
• Structural reinforcement
• Concrete repair services
• Industrial resin flooring

Headquarters

HQ city

Saint-jean-de-beauregard

HQ country

France

HQ region

Europe

Offices10 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Specialty Construction Services: One-time project-based revenue from specialized waterproofing, concrete repair, structural reinforcement, and specialty flooring construction works. Projects range from small interventions to multi-month major infrastructure projects. Revenue is derived from direct contracts with project owners (public authorities, state-owned enterprises, general contractors, private property owners) and subcontracting arrangements with major construction firms.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Etandex provides specialized construction services in France focused on waterproofing, structural repair and reinforcement, and technical flooring. Its portfolio covers four core technical expertise lines — containment coatings, tanking/cuvelage, structural repairs and reinforcement, and industrial flooring — delivered across specialized domains including flat roofs, water reservoirs, swimming pools, collective kitchens, underground structures, and civil engineering works. Projects are executed by dedicated regional branch teams using proprietary composite resin systems and mechanized/robotized application technologies.

Product overview

Etandex is France's leading independent specialty construction company offering a comprehensive portfolio of waterproofing, sealing, and structural reinforcement services. The company's offerings center on four core service lines: containment coatings (Revêtements étanches de rétention), waterproofing and tanking (Etanchéité et cuvelage), structural repairs and reinforcement (Réparations et renforts de structure), and technical flooring (Sols techniques), complemented by anti-corrosion coatings. These core services are delivered across six specialized domains: terrace roofing (Toitures Terrasses), water towers and reservoirs (Château d'Eau et Réservoirs), swimming pools and aquatic centers (Bassins et Plages de Piscine), collective kitchens (Cuisines Collectives), underground pressurized structures (Ouvrages enterrés en sous pression), and civil engineering structures (Ouvrages de Génie Civil). The company also develops proprietary technology innovations including the ARGOS robot for automated spraying applications.

Differentiator

Problem solved

Functional benefit

Products and services

• Revêtements étanches de rétention (Containment Waterproofing Coatings) Waterproofing coatings for containment structures designed to hold water or other liquids, preventing leakage and ensuring environmental protection. Applied to basins, reservoirs, swimming pools, fountains, and water treatment infrastructure for public authorities, municipalities, and aquatic facility operators.
• Etanchéité et cuvelage (Waterproofing and Tanking) Waterproofing and tanking (cuvelage) services for underground structures to prevent water penetration from surrounding soil, including extrados and intrados techniques for underground pressurized structures. Etandex positions itself as the undisputed leader in France for this market, using proprietary intrados waterproofing systems such as TECTOPROOF CA (CSTB ATex Case A certified).
• Réparations et renforts de structure (Structural Repair and Reinforcement) Structural repair and reinforcement services including concrete restoration, carbon fiber strengthening, corrosion protection, cathodic protection, and seismic upgrades. Includes an in-house engineering bureau (bureau d'études) that designs and implements bespoke carbon fiber reinforcement solutions for bridges, viaducts, and structural elements.
• Sols techniques (Technical Industrial Flooring) Technical industrial flooring solutions including resin-based floor coatings (polyurethane, epoxy, composite stratified systems) for commercial, industrial, and institutional facilities requiring waterproof, slip-resistant, and seamless surfaces. Includes the P4S stratified waterproofing system for collective kitchens and decorative quartz/tile-finish options.
• Revêtement anti corrosion (Anti-corrosion Protective Coatings) Anti-corrosion protective coatings for concrete and metal structures exposed to harsh environments, including chemical plants, cokeries, industrial chimneys, and marine structures such as port hangars.
• Toitures Terrasses (Flat Roof Waterproofing) Flat roof waterproofing services for residential, commercial, and public buildings using bituminous membranes, PVC, EPDM, liquid resins, and vegetated roof systems. Covers accessible terraces, non-accessible zones, planted equipment areas, and rooftop technical spaces.
• Château d'Eau et Réservoirs (Water Towers and Reservoirs) Water tower and reservoir rehabilitation services for water utilities, municipalities, and state technical services, including exterior waterproofing, interior tank lining, structural repairs, and decorative fresco painting. Addresses aging reservoirs, water level fluctuations, thermal stresses, and corrosion.
• Bassins et Plages de Piscine (Swimming Pools and Aquatic Centers) Swimming pool basin and pool deck waterproofing with composite coatings and decorative resin finishes for municipal pools, aquatic centers, thalassotherapy spas, and water parks. Khiral composite decorative waterproofing system offers quartz color and tile aesthetic options.
• Cuisines Collectives (Collective Kitchen Flooring) Collective kitchen flooring using waterproof, slip-resistant, seamless resin systems (P4S stratified) that eliminate joint-related hygiene issues. Designed for hotels, hospitals, school cafeterias, company restaurants, and institutional catering, with documented time savings of up to 50% in cleaning.
• Ouvrages enterrés en sous pression (Underground Pressurized Structures) Tanking and waterproofing of underground pressurized structures using extrados and intrados waterproofing techniques. Etandex positions itself as the leader in France for this market, addressing groundwater ingress, structural cracking, vapor barrier requirements, and fire compartmentalization between parking levels.
• Ouvrages de Génie Civil (Civil Engineering Structures)

Quantifiable outcome

• 1,500+ construction projects executed per year across France
• +4 more outcomes

Named customers20 records

Segments7 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• Solétanche BachyminorImplementation/ SI/ Consulting PartnerEtandex worked as a specialist subcontractor to Solétanche Bachy on the Tunnel T33 project in Monaco, installing a waterproofing complex in the vault and sidewalls using felt, PVC membrane, and PVC protection layers. This is a standard subcontracting relationship rather than a formal partnership.

Scale indicators10 records

Recent moves8 records

Expansion highlights5 records

Broad incumbents

• NGE: Major independent French civil-works contractor active in earthworks, utilities, rail and road construction. Larger and more diversified than Etandex, but competes for the same public-infrastructure tenders and increasingly offers specialty waterproofing and structural-repair services in-house.
• Razel-Bec (Fayat Group): Fayat Group's heavy-civil construction subsidiary, active in tunnels, bridges, dams and transport infrastructure. Larger and more diversified than Etandex but competes for the same French infrastructure rehabilitation contracts on bridges, tunnels and water infrastructure.
• Saint-Gobain Weber France: French arm of Saint-Gobain's façade and waterproofing systems business. Provides waterproofing mortars, façade coatings and building-envelope solutions that compete with Etandex's terrace and exterior waterproofing offerings across the French new-build and refurbishment markets.
• Mapei France: French arm of Mapei, one of the world's largest construction-chemicals producers. Supplies waterproofing, resin flooring and concrete repair systems — overlapping head-to-head with Etandex's waterproofing and resin flooring product lines — though Mapei is a manufacturer rather than a specialty contractor.
• Sika France: French arm of Swiss Sika AG, a global construction-chemicals supplier. Although primarily a materials supplier rather than a specialty contractor, Sika competes in the same waterproofing and resin-coating performance space and is a benchmark for the European waterproofing systems market Etandex services.

Direct peers

• Bessac (VINCI subsidiary): Solétanche Bachy subsidiary specialized in tunnel construction and underground works. Bessac's tunnel waterproofing and segmental lining work overlaps directly with Etandex's tunnel/canal waterproofing track record (Tunnel Maurice Lemaire, Passage Gambetta, A86 cover).
• Freyssinet (VINCI Construction): Subsidiary of VINCI Construction specializing in structural repair, strengthening and post-tensioning for bridges, tunnels and civil engineering structures — directly comparable to Etandex's carbon-fiber reinforcement and structural repair practice. Operates as another specialist trade arm of a major French group.
• Solétanche Bachy (VINCI Construction): VINCI subsidiary focused on foundations, underground works and waterproofing of deep structures. Etandex already works as a subcontractor to Solétanche Bachy (Tunnel T33, Monaco) and both firms compete and collaborate on the same complex underground/cuvelage projects in France.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@etandex-travauxspeciaux?feature=shared
• LinkedInlinkedin.com/company/etandex

Compliance5 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 Etandex