Elektro-Isola

What Elektro-Isola does

Elektro-Isola A/S is a privately held, family-owned Danish manufacturer of thermosetting composite materials, founded in 1921 in Vejle, Denmark, and now in its third generation of family ownership. The company develops, produces, and processes paper-reinforced (Etronit®), cotton-reinforced (Etronax®), and glass-fabric-reinforced (G-Etronax®, including the high-temperature G-Etronax PI polyimide variant) composite materials in sheet and tube form. These materials serve as electrical insulation and precision mechanical components in demanding industrial applications, with the company operating a fully integrated internal value chain from resin impregnation and pressing/winding through CNC machining and quality testing.

The firm's products are qualified into safety-critical applications such as oil-filled and dry-type transformers, traction transformers for rail and electric vehicles, switchgear, vacuum pump rotary vanes, high-speed spindle bearing cages, and piston/guiding rings. Customers include transformer manufacturers, traction transformer builders, switchgear producers, spindle bearing manufacturers, and vacuum pump OEMs — all enterprise B2B accounts requiring technical consultation and custom specifications. Specialized product grades such as G-Etronax PM GPO3, EP 11, and EP FR4 are tailored to specific arc resistance, chemical resistance, fire-retardant, and high-temperature (up to 210°C) requirements.

Elektro-Isola monetizes through custom composite material sales and precision CNC machining services, with quote-based pricing, multi-year enterprise contracts, and dedicated technical sales representatives assigned by industry vertical (transformer, industrial, defence). Distribution combines direct technical sales from Denmark with two regional channel partners — Franklin Lamitex, LLC in the United States and ICTDP in France. The company is ISO 9001 (since 1995) and ISO 14001 (since 2003) certified, joined the SBTi in 2021, and recently introduced an energy surcharge to offset rising input costs.

Name

Elektro-Isola

Legal name

Elektro-Isola A/S

Website

https://elektro-isola.com

Company type

Private

Founded year

1921

Operating status

Operating

Headcount range

51–100 employees

Short description

Elektro-Isola A/S is a family-owned Danish manufacturer founded in 1921 that produces custom thermosetting composite materials (Etronit®, Etronax®, G-Etronax®) for enterprise customers in transformers, switchgear, traction, vacuum pumps, and precision mechanical components.

Ownership category

akta.pro rank

Headquarters

HQ city

Vejle

HQ country

Denmark

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Composite Materials Manufacturing: Design, development, and production of custom thermosetting composite materials including sheets and tubes. Manufacturing process includes impregnation of reinforcement fabrics with proprietary resin mixtures, pressing of plates, and winding of tubes to customer specifications.
2. Precision Machining Services: CNC machining of composite plates and tubes into customer-specific components. Services include milling, turning, and finishing to tight tolerances.
3. Technical Consultation and Material Selection: Expert technical advice on optimal material selection and processing methods for customer applications.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Elektro-Isola develops, produces and processes advanced thermosetting composite materials (Etronit, Etronax, G-Etronax, G-Etronax PI) for electrotechnical and mechanical applications. Through a fully integrated internal value chain — from proprietary resin impregnation and pressing to CNC machining — the company supplies custom sheets, tubes, and finished components to enterprise manufacturers in transformers, switchgears, traction, bearings, vacuum pumps, and other demanding industries.

Product overview

Elektro-Isola develops, produces, and processes advanced thermosetting composite materials for electrotechnical and mechanical applications. The product portfolio consists of three main material families: Etronit® (paper-reinforced composites with good electrical insulation properties and medium mechanical strength), Etronax® (cotton-reinforced composites with excellent mechanical properties, self-lubricating characteristics, and high wear resistance for mechanical applications), and G-Etronax® (glass fabric-reinforced composites offering the highest electrotechnical and mechanical performance, with temperature resistance up to 210°C). G-Etronax PI represents the glass/polyimide variant with extraordinarily high temperature index. Products are available as sheets or tubes and can be machined to customer specifications.

Differentiator

Problem solved

Functional benefit

Brands

• Etronit: Paper-reinforced thermosetting composite material with good electrical insulating properties and mechanical strength, suitable for applications up to 120°C
• Etronax
• G-Etronax

Products and services

• Etronit® Paper-reinforced thermosetting composite material with good electrical insulation properties and medium mechanical strength, suitable for applications up to 120°C. Sold as sheets, tubes, or customer-specific machined components to electrical and mechanical OEMs.
• Etronax® Cotton-reinforced thermosetting composite material with excellent mechanical properties, low friction, self-lubricating characteristics, and high wear resistance. Available in multiple grades (MF, MMF, MMMF, DN) for mechanical applications such as ball-bearing cages, guiding rings, and rotary vanes.
• G-Etronax® Glass fabric-reinforced thermosetting composite material combining exceptional electrical insulation with high mechanical strength and temperature resistance up to 210°C for certain grades. Includes specialised variants such as PM GPO3 (highest arc and creep resistance), EP 11 (temperature and chemical resistance), and EP FR4 (fire-retardant). Sold as sheets, tubes, or machined parts to electrical equipment OEMs.
• G-Etronax PI Glass/polyimide sheets and tubes within the G-Etronax family with extraordinarily high temperature index, designed for extreme thermal requirements in demanding electrical and mechanical applications.
• Custom CNC Machining Services CNC machining of Etronit, Etronax, and G-Etronax plates and tubes into customer-specific finished components, including milling, turning, and finishing to tight tolerances. Sold as a value-added service to enterprise customers buying composite materials.

Quantifiable outcome

• G-Etronax retains flatness under high temperatures, varying loads, and chemical exposure due to very low thermal/length expansion coefficient
• +1 more outcomes

Named customers5 records

Segments2 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Three partnerships are on record, tiered core and regional.

• Confederation of Danish Industry (Dansk Industri)coreStrategic or Co-development Partner · 1 January 2021Participated in Climate Ready SME project where CO2 emissions were determined. Calculations based on 2018 figures became the starting point for SBTi commitment to reduce emissions by 50% by 2030.
• Franklin Lamitex, LLCregionalChannel Partner/ Reseller/ DistributorAmerican partner handling sales and distribution of Elektro-Isola composite materials in the United States market. Contact: +1 800-233-9739, [email protected], www.lamitex.com
• ICTDPregionalChannel Partner/ Reseller/ DistributorFrench partner handling sales and distribution of Elektro-Isola composite materials in France. Contact: +33 7 6439 5369, [email protected], ictdp.fr

Scale indicators4 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Attwater Group: UK manufacturer of industrial laminates (Tufnol-type) and machined components for electrical insulation and mechanical applications. Comparable in scale, niche focus, and customer types to Elektro-Isola.
• Glastic Corporation: US manufacturer of glass-reinforced polyester and other thermoset laminates used in electrical equipment, switchgear, and motor applications. Direct competitor in the glass-reinforced thermoset composite space overlapping with G-Etronax.
• Haysite Reinforced Plastics: US-based manufacturer of glass-reinforced thermoset polyester laminates for electrical insulation, switchgear, and transit applications. Comparable in customer overlap (transformer/traction) and material platform (glass-reinforced composites) to G-Etronax grades.
• Norplex-Micarta: US-based manufacturer of thermoset industrial laminates (paper, cotton, and glass-reinforced phenolic/epoxy) for electrical insulation and mechanical applications. Directly comparable to Elektro-Isola across Etronit, Etronax, and G-Etronax product categories, serving transformer, switchgear, and bearing customers.
• Tufnol Composites: UK-based manufacturer of cotton-, paper-, and glass-fabric-reinforced phenolic laminates for electrical and mechanical engineering. Very similar product portfolio to Elektro-Isola, with comparable focus on traction, transformer, and bearing-cage applications.
• Franklin Lamitex: US distributor and manufacturer of industrial thermoset laminates for electrical and mechanical uses; also Elektro-Isola's channel partner for the US market. Comparable product line and customer base, with overlap in cotton- and glass-reinforced phenolic composites.

Broad incumbents

• Von Roll Holding: Swiss-headquartered global supplier of electrical insulation systems, including resin-rich and laminate products for motors, transformers, and generators. Comparable in target end-uses (transformer insulation) but operates at a much larger scale with a broader product portfolio than Elektro-Isola.
• Elantas (Altana division): Global manufacturer of insulating resins, varnishes, and composite materials for the electrical and electronics industries. Overlaps with Elektro-Isola on electrical insulation end-markets but operates across a much broader product range (resins, coatings, composites).
• Rogers Corporation (DuPont): US specialty engineered materials company with high-performance thermoset and composite products serving power electronics, EV/HEV, aerospace, and defence. Overlaps with Elektro-Isola on high-end electrical/mechanical composite applications but operates at substantially larger scale across multiple specialty materials categories.
• Sumitomo Bakelite: Japanese specialty materials manufacturer producing phenolic and epoxy-based thermoset laminates, including electrical-grade industrial laminates. Comparable materials platform to G-Etronax, with much broader global scale and product portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/elektro-isola

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles21 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 Elektro-Isola