VUKI

What VUKI does

VUKI a.s. is a privately-held Slovak specialty industrial manufacturer founded in 1950 as the Research Institute of Cables and Insulators and transformed into a joint-stock company in 1992. The company operates from Bratislava, Slovakia and is organized around two core divisions: (1) cable production and sale, encompassing halogen-free and PVC power cables, signal cables, coaxial cables (50Ω and 75Ω), fiber optic cables, industrial cables, and special cables for nuclear power plants, railways, and explosive environments; and (2) electroinsulating varnishes, resins, winding wires, potting compounds (VUKOL N series), and related impregnation services (DIP, VPI, dripping). The technology foundation rests on 70+ years of in-house R&D, supported by an active patent portfolio (12+ granted patents spanning 1985–2018), collaboration with Slovak Technical University (STU) and the Slovak R&D Agency (APVV), and proprietary chemical formulations with temperature classes up to 220°C and fire-resistance ratings including B2ca s1 d1 a1 under CPR EN 50575 plus 30–180 minute fire circuit integrity. VUKI was the first Slovak producer of certified nuclear power plant cables (since 2009), with documented 40-year lifespan guarantees in VVER 440 reactor primary zones. The company makes money almost entirely through hardware sales of cables and chemical products, with pricing primarily quote-based for custom orders and standard price lists for selected products like enamelled round wires; sales are conducted via direct sales representatives and department managers, supported by external sales agents (e.g., Techbro s.r.o.), consignment stock arrangements, and a dedicated shipping/expedition department. Primary customers are industrial enterprises, nuclear power plants, electrical machine manufacturers, and construction/building sector firms across Slovakia and Central Europe, with documented international project supply into Africa, Latin America, the Middle East, and Pakistan; reference customers include Mochovce and Bohunice nuclear power plants, Slovnaft, Duslo Šaľa, Volkswagen, and CERN.

Name

VUKI

Legal name

VUKI a.s.

Website

https://vuki.sk

Company type

Private

Founded year

1950

Operating status

Operating

Headcount range

11–50 employees

Short description

VUKI a.s. is a privately-held Slovak specialty industrial manufacturer, founded 1950, producing certified fire-resistant and nuclear-grade cables plus electroinsulating varnishes, resins, and winding wires for industrial, nuclear power, and electrical machine customers in Central Europe and select international markets.

Ownership category

akta.pro rank

Product category

Cable Manufacturing and Electrical Insulation Materials

NAICS

Communication and Energy Wire and Cable Manufacturing (33592), Fiber Optic Cable Manufacturing (335921), Other Communication and Energy Wire Manufacturing (335929)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600), Electronic Components & Accessories (3670)

akta.pro primary industry

Control, Instrumentation & Automation Cable (IMADAMAC)

akta.pro secondary industries

Data, Communications & Fiber Optic Cable (IMADAMAD), Cable Accessories & Joints/Terminations (splices, joints, terminations, link boxes) (EUADADAC)

Keywords

• Power cable manufacturing
• Electroinsulating varnishes
• Winding wire production
• Fire-resistant cables
• Nuclear grade cables

Headquarters

HQ city

Bratislava

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Cable production and sale: Manufacturing and sale of standard and special cables including power cables, signal cables, coaxial cables, optic cables, and industrial cables. Products are sold directly through commercial representatives and through business representation partners.
2. Electroinsulating varnishes and resins: Production and sale of impregnating varnishes, resins, and related products for electrical winding insulation. Includes dip impregnation, VPI impregnation, and dripping technologies.
3. Winding wires: Manufacturing of copper and aluminum winding wires made to order based on customer specifications. Copper is ordered separately as required.
4. Heat-shrinkable materials and heating products: Production of heat-shrinkable products and heating mats for electrical insulation and floor heating applications.
5. Technical services and R&D: Full technical service including testing, introducing new impregnants at customer facilities, and impregnant analysis. Also involved in APVV research projects.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

VUKI a.s. manufactures and sells electrical cables (power, signal, coaxial, fiber optic, industrial, fire-resistant, and nuclear-grade) along with electroinsulating varnishes, resins, and winding wires for industrial customers. The company produces both standard catalog products and custom-engineered solutions for demanding applications including nuclear power plants, electrical machine manufacturing, and special industrial environments. Their offerings include CPR-certified cables, heat-shrinkable materials, heating mats, potting compounds, and impregnation technologies (DIP, VPI, dripping).

Product overview

VUKI a.s. is a manufacturing and trading company founded in 1950, specializing in two main divisions: (1) Standard and special cable production including power cables (halogen-free and PVC), signal cables, coaxial cables (75Ω and 50Ω), fiber optic cables, and industrial cables with fire-resistant ratings; and (2) Electroinsulating varnishes, resins, and winding wires. The company offers comprehensive manufacturing processes including DIP, VPI, and dripping impregnation technologies, along with potting compounds, adhesives, and specialty products like UV and water-based impregnants. Products serve industrial applications including nuclear power plants, automotive, construction (CPR-compliant fire-rated cables), and electrical equipment manufacturing.

Differentiator

Problem solved

Functional benefit

Products and services

• Halogen-free power cables Power cables for voltages up to 1 kV in halogen-free design with increased resistance to fire propagation, low corrosivity of combustion gases, and low smoke density during combustion. Available in standard circular cross-section, 2 and 3-wire versions including flat alternatives.
• PVC power cables Power cables for voltages up to 750 V in standard PVC design with circular cross-section or self-supporting construction, in 2 and 3-wire versions including flat alternatives for mounting under flush.
• Halogen-free signal cables Signal and control cables with different types of EMC shielding in halogen-free design with defined fire functionality for up to 180 minutes.
• Coaxial cables (50Ω and 75Ω) 50Ω and 75Ω coaxial cables with different types of inner and outer cores and EMC shielding, available in halogen-free design with increased resistance to fire propagation.
• Fiber optic cables Fiber optic cables with different types of fibers, available in central tube or loose tube design, in standard or self-supporting design.
• Halogen-free industrial cables Power and signal cables for demanding industrial environments and nuclear power plants, complying with requirements for flame resistance, low corrosivity, and low density of combustion gases.
• Industrial cables Cables for control of industrial processes, cabling of electronic devices, and interconnection of process devices and control devices. Available in spark-safe design for standard and damp environments.
• Special cables Custom cables for nuclear power plants, explosive environments, rodent-resistant applications, railway use, and specialized industrial environments. Includes cables with CPR B2ca s1 d1 a1 certification and fire circuit integrity for 30, 60, 90 minutes per STN 92 0205 and IEC 60331-21 standards.
• Heat shrinkable materials (TZH series) Products made from modified polyethylene that acquire shape memory after heating, used for electrical insulation of cable joints and electrical components. Manufactured in 5 basic variations with 5 to 15 individual dimensions each.
• Heating mats Heating mats installed under parquet, carpet, or tile flooring for floor heating. Tailor-made according to customer requirements, delivered within 2 weeks.
• Winding wires Custom-manufactured winding wires made to order based on customer-specified parameters. Includes copper and aluminum conductors in rectangular and round cross-sections with various insulation types.
• VUKOL N Series (Polyurethane potting compounds) Two-component polyurethane potting compounds for electronics encapsulation with various hardness levels and flexible/elastic properties. Includes N22, N22/60, N33, N33/60, N33u, N34, N62 variants for protection against moisture, dust, and mechanical stress.
• NAB Series (ECO friendly resins) ECO friendly impregnating resins with low VOC content rated at 180°C (H) temperature class with VOC <2%. Includes NAB/800-1K, NAB/400-1K, NAB/250-1K, and NAB/UV-1K for UV curing.
• NK/NZ Series (High-temperature impregnating resins) High-temperature impregnating resins. NK 50 series rated at 220°C (C) for 30/60/90 minute cure options. NZ 83 and NZ 83/500 rated at 155°C (F) with fast cure times of 15-30 min at 130°C.
• NH Series (Impregnating varnishes) Impregnating varnishes rated at 180°C (H). NH 91 series with VOC 3-4.5%, curing at 135-150°C for 3-5 hours. Available in standard, LV, MV, and /u variants.
• WASOL Series (Water-soluble impregnants) Water-soluble impregnating compounds (WASOL 20, 40, 65) rated at 180°C (H) with approximately 0% VOC content, curing at 150°C for 2 hours.
• VUPOXY E-1K/Z (Epoxy resin) One-component epoxy potting compound rated at 180°C (H) with approximately 0% VOC content, curing in 15-30 minutes at 160°C with exceptional strength of reinforcement at 600-640 N.
• LAK Series (Lacquers) Industrial lacquers rated at 155-180°C. LAK 372 with air drying and approximately 60% VOC. LAK 380 with 2-4 hour cure at 130-160°C.
• ELFIX Series (Adhesives/Sealants) Electrical insulating adhesives and sealants. ELFIX 410 and 510 cure at room temperature (24-36h) or at 130°C. ELFIX 410 1K-T cures at 160°C for 45-60 minutes.

Quantifiable outcome

• Cables can be functional in fire for 180 minutes
• +2 more outcomes

Named customers10 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Eleven partnerships are on record, tiered core and minor.

• BDtroniccoreStrategic or Co-development Partner · 1 January 2025Collaboration on eco-friendly impregnation technology using BDtronic's B8650 impregnation machine and VUKI's NAB/800/Z ecological resin for electric motor production. Project demonstrates sustainable manufacturing practices for induction motors.
• AVK (Cable and Wire Manufacturers Association)coreStrategic or Co-development PartnerVUKI is a member of the Cable and Wire Manufacturers Association (AVK), which coordinates industry standards, represents manufacturers' interests, and promotes transparency in pricing through publishing copper quotation averages.
• ZCHFP SR (Zväz chemického a farmaceutického priemyslu SR)minorOthersIndustry association for chemical and pharmaceutical industry in Slovakia. VUKI participates as a member of this association.
• EASA (The Electrical Apparatus Service Association, Inc.)minorOthersInternational association for electrical apparatus service. VUKI participates as a member.
• EEIM (European Association of Electroinsulating Materials Manufacturers)coreStrategic or Co-development PartnerEuropean association of electroinsulating materials manufacturers. VUKI is a member, participating in industry coordination and standards development.
• ZEP SR (Zväz elektrotechnického priemyslu SR)minorOthersSlovak electrotechnical industry association. VUKI is a member.
• ZPVVO (Zväz priemyselných výskumných a vývojových organizácií)coreStrategic or Co-development PartnerAssociation of industrial research and development organizations. VUKI researchers regularly participate in APVV projects and cooperate on research initiatives.
• STU (Slovenská technická univerzita v Bratislave)coreStrategic or Co-development PartnerSlovak Technical University in Bratislava. VUKI intensively cooperates with STU on research and development projects.
• APVV (Agentúra na podporu výskumu a vývoja)coreStrategic or Co-development PartnerSlovak Research and Development Agency. VUKI researchers regularly participate in solving APVV research projects.
• OPBK (Operačný program Bratislavský kraj)minorOthersOperational Program Bratislava Region. VUKI participates in regional development projects.
• Techbro s.r.o.minorChannel Partner/ Reseller/ DistributorExternal sales representative for electroinsulating varnishes, resins, and winding wires. Ing. Miloš Nunvář serves as external commercial representative through Techbro s.r.o.

Scale indicators6 records

Recent moves11 records

Expansion highlights5 records

Broad incumbents

• Hitachi Chemical (Resonac): Japanese specialty chemicals and electronic materials company producing insulating materials, varnishes, and electronic-grade compounds for electrical equipment. Comparable in high-temperature electroinsulating materials and impregnating resins at greater scale.
• Prysmian Group: Global leader in cables for energy, telecommunications, and industrial applications. Directly comparable product portfolio across power, fire-resistant, fiber optic, and specialty cables, but operates at vastly greater scale with broader geographic reach than VUKI.
• Nexans: French global cable manufacturer serving power infrastructure, industry, and telecom. Overlaps with VUKI in fire-resistant power/signal cables and specialty industrial cabling, and competes in European CPR-regulated segments.

Direct peers

• Elantas (BASF): World-leading manufacturer of electroinsulating varnishes, resins, and potting compounds for electrical machines — the most direct comparable to VUKI's Electroinsulating Resins and Varnishes division, including impregnating resins, water-based systems, and 2K-PUR potting compounds.
• Belden Inc. US-based specialty cable manufacturer focused on signal, control, and coaxial cables for industrial, broadcast, and enterprise networking. Comparable in coaxial (50/75Ω), signal, and fiber optic cable categories where VUKI competes.
• LEONI AG: German manufacturer of wires, cables, and wiring systems with strong presence in automotive and industrial segments. Comparable in cable customization for demanding industrial customers (e.g., VW in VUKI's customer list) and in specialty cable design.
• Habia Cable: Swedish specialty cable manufacturer focused on custom and high-performance cables for industrial, nuclear, and defense applications. Highly comparable niche positioning to VUKI's special cables for nuclear, railway, and extreme-environment applications.
• Von Roll Holding AG: Swiss specialty materials company producing electrical insulation products including impregnating resins and mica-based insulation. Closely comparable in the electroinsulating materials and winding wire insulation space VUKI addresses with its NK/NZ/NAB/WASOL series.

Emerging players

• Kromberg & Schubert: German manufacturer of cable harnesses, wires, and special cables for automotive and industrial customers. Comparable in made-to-order custom cable manufacturing for industrial OEMs such as automotive clients VUKI also serves.

Regional players

• Tele-Fonika Kable: Central European (Poland-headquartered) cable manufacturer with similar product portfolio in power, signal, and specialty cables. Direct regional peer with overlapping Central European customer base and comparable scale profile.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/watch?v=9ut3ig1FaUY
• LinkedInlinkedin.com/company/vuki

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 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 VUKI