SIPREM

What SIPREM does

SIPREM S.A. is a French specialty manufacturer founded in February 1974 by Raymond Martin and headquartered in Mézériat, Ain, France. The company designs and produces custom epoxy resin and silicone insulating components for electrical equipment OEMs operating across high voltage (up to 600 kV standard, up to 1,000 kV for special applications), medium voltage (5.5–72 kV), railway, nuclear, and telecommunications end-markets. Product lines span post insulators, capacitive insulators, indoor and outdoor bushings, cable terminations, GIS (Gas Insulated Switchgear) components, distribution and isolation transformers, and custom molded parts. The technology platform rests on the proprietary Automatic Pressure Gelation (APG/GPA) process developed by the founder, supported by 12 vacuum mixers (20–200 L capacity), 13 semi-automatic horizontal presses, vacuum casting chambers (0.3–5 m³), and an in-house testing laboratory capable of dielectric strength testing to 150 kV, partial discharge measurement below 2 pC at 50 kV, and lightning impulse testing to 250 kV.\n\nThe company's revenue model is custom B2B contract manufacturing. SIPREM provides design assistance, material selection, prototyping, and series production under quote-based pricing rather than a published catalog. The go-to-market is direct technical engagement with engineering and procurement departments of major electrical OEMs (Alstom, Siemens, Schneider Electric, Areva, Nexans, Trench, RTE), railway suppliers (Faiveley, Jeumont), defense and infrastructure contractors (Thales, Bouygues, Vinci), and other industrial buyers. The customer roster spans Europe with no disclosed geographic expansion outside the region.\n\nSIPREM is privately held under family ownership, with the founding Martin family retaining control: Christian Martin serves as PDG (CEO), and Elisabeth Martin holds the Finance and Administration Director position. The company employs approximately 30 people at an average age of 40, operates from a 3,000 m² covered facility on an 8,700 m² site, and holds ISO 9001 (since 2006), ISO 14001 (since 2013), and BS OHSAS 18001 (since 2013) certifications alongside sector-specific compliance (IEC 61243, NF F 16-101, IP68). Average annual turnover over the recent five-year window is approximately €3.5 million. The company carries no external funding, no subsidiaries, and no disclosed acquisition activity.

Name

SIPREM

Legal name

SIPREM S.A.

Website

https://siprem.fr

Company type

Private

Founded year

1974

Operating status

Operating

Headcount range

1–10 employees

Short description

French family-owned B2B manufacturer founded in 1974 that designs and produces custom epoxy resin and silicone insulating components (insulators, bushings, transformers) for high and medium voltage electrical, railway, nuclear, and telecommunications OEM customers across Europe.

Ownership category

akta.pro rank

Headquarters

HQ city

MÉZERIAT

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Insulator Manufacturing: SIPREM generates revenue through custom manufacturing of epoxy and silicone insulating components for industrial customers in electrical, railway, nuclear, and telecommunications sectors. The company provides design assistance, prototyping, and series production services. Average turnover over 5 years is approximately €3.5 million.
2. Standard Product Lines: Standard product ranges including post insulators (7.2 kV to 72 kV), capacitive insulators (7.2 kV to 36 kV), bushings, transformers (TMD), and distribution boxes sold as finished components.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

SIPREM designs, formulates, and manufactures custom epoxy resin and silicone insulating components for medium, high, and very high voltage electrical applications (5.5 kV to 1000 kV). The company produces insulators, bushings, transformers, distribution boxes, cable ends, GIS components, silicone sleeves, and custom molded parts for electrical equipment manufacturers, railway, nuclear, and telecommunications customers. SIPREM provides in-house engineering support from product conception through series production, including design assistance, material selection, mould design, and quality testing.

Product overview

SIPREM is a French manufacturer specializing in epoxy resin and silicone insulating components for electrical technology applications. The product portfolio centers on three core product lines: (1) Insulators including Post Insulators (7.2-72 kV) and Capacitive Insulators (7.2-36 kV) for indoor and outdoor use; (2) Bushings including Indoor Bushings (7.2-24 kV, 250-1250 A), Outdoor Bushings (400-1250 A), and High Voltage Bushings (72-1000 kV); and (3) Transformers including the TMD® distribution transformer (2-48 kVA), Distribution Box, High Insulation transformer, and Low Voltage transformer. Additional specialized products include cable ends (72-550 kV), GIS components, custom epoxy caps/envelopes, and silicone sleeves/insulating parts (5.5-245 kV). The company also offers custom design engineering services and manufacturing using GPA/APG, vacuum casting, and centrifugation processes. Applications span medium/high/very high voltage electrical technology (82%), radio telephony, rail transport, nuclear, and aggressive chemical environments.

Differentiator

Problem solved

Functional benefit

Brands

• TMD: Transformateur Moyenne Distribution (Medium Distribution Transformer) - transformers with primary voltage 3000V to 5500V and power from 2 to 48 kVA

Products and services

• Isolateur Support (Post Insulator) Epoxy resin post insulators for indoor and outdoor electrical applications, rated for nominal voltages from 7.2 kV to 72 kV with bending strength from 2 kN to 12 kN. Sold to electrical equipment manufacturers and infrastructure operators.
• Isolateur Capacitif (Capacitive Insulator) Capacitive-type epoxy resin insulators for indoor use, rated for nominal voltages from 7.2 kV to 36 kV with bending strength from 2 kN to 4 kN. Designed for medium voltage indoor equipment.
• Traversée Intérieure (Indoor Bushing) Indoor epoxy resin bushings rated for nominal voltages from 7.2 kV to 24 kV and nominal currents from 250 A to 1250 A, with optional electric stress control. Designed for indoor switchgear and transformer applications.
• Traversée Extérieure (Outdoor Bushing) Outdoor-rated epoxy resin bushings with nominal currents from 400 A to 1250 A, designed for exterior electrical installations.
• TMD® Transformer (Medium Distribution Transformer) Medium voltage distribution transformer with primary voltage 3000 V to 5500 V and secondary voltage 237 V to 410 V, available in single-phase and three-phase configurations with power ratings from 2 to 48 kVA. Sub-brand of SIPREM.
• Boîte de Dérivation (Distribution Box) Distribution box for medium voltage networks (3000 V to 5500 V) with 130 A nominal current, featuring integrated VDS and optional locking for TMD power supply, junction, branch, earthing, and insulation functions.
• Haute Isolation (High Insulation Transformer) High-isolation transformer with primary voltage 230 V to 400 V (adjustable ±5%), available in 12, 18, 36 kVA ratings with primary/secondary insulation rated at 50 kV/1min test voltage and 125 kV lightning impulse.
• Basse Tension (Low Voltage Transformer) Low voltage transformer with primary and secondary voltages from 127 V to 970 V, designed for applications including public lighting, private distribution, sports event power, GSM installation insulation, and low voltage power supply.
• Extrémités de Câble (High Voltage Cable Ends) High voltage cable termination products for 'dry' and 'oil' cable systems, rated from 72 kV to 550 kV and weighing from 10 to 650 kg. Used by cable manufacturers and utilities.
• GIS Products (Gas Insulated Switchgear Components)

Named customers16 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

Feature6 records

Partnerships

One partnership is on record.

• LCIE (Bureau Veritas)coreImplementation/ SI/ Consulting PartnerLCIE provides product certification and testing services for SIPREM products. SIPREM holds multiple LCIE certificates including LCIE 183 128 for certain products and LCIE 447 195 for IP68 transformer classification.

Scale indicators8 records

Recent moves3 records

Expansion highlights5 records

Direct peers

• Aditya Birla Insulators (Aditya Birla Group): India-based global manufacturer of porcelain and composite (polymer) insulators for HV and EHV transmission and distribution. Comparable at the product category level (HV insulators up to 1,200 kV) and similar vertical focus on electrical utilities and infrastructure OEMs, though with much larger scale and a different geographic footprint.
• Pfisterer Holding AG: German manufacturer of high-voltage insulator systems, cable accessories, and contact wire equipment for power transmission, railway electrification, and industrial applications. Comparable in vertical specialization across HV insulation and railway segments, with stronger scale but overlapping technology and customer overlap with SIPREM.
• MacLean Power Systems: US-based manufacturer of polymer insulators, arresters, and HV distribution products for utility, railway, and industrial markets. Closest US analogue to SIPREM in product mix (polymer post insulators, distribution-class insulators) and in target customer industries (utilities, railway, telecom).
• VonRoll Casting: Swiss-based manufacturer specializing in cast epoxy resin insulators and bushings for medium and high voltage applications (e.g., instrument transformers, switchgear, cable terminations). Direct one-to-one match to SIPREM's product portfolio, material technology (cast epoxy/APG), and target OEM customer base across electrical equipment.
• Trench Group (formerly Trench Limited): Manufacturer of high-voltage instrument transformers, coil products, and HV bushings. Listed as a customer of SIPREM (epoxy insulators), making it a tightly coupled peer on the buy-side for the same product class and a natural comparison point for HV insulation scope and qualification depth.

Broad incumbents

• Nexans: Global cable and cable accessories manufacturer (also a SIPREM customer for cable insulation products). Broad incumbent in power infrastructure that competes with SIPREM at the cable-accessory interface and offers integrated cable-system solutions including polymer insulation components.
• Prysmian Group: World's largest cable manufacturer, with significant presence in HV and EHV cable systems including cable terminations and accessories. Similar broad-incumbent profile to Nexans — operates adjacent to SIPREM in HV cable infrastructure, with overlapping customers in utilities and EPC contractors.
• Siemens Energy: German incumbent in HV transmission, switchgear, transformers, and grid technology, and a named SIPREM customer for epoxy insulators. Comparable technology footprint at the system level; relevant for benchmarking SIPREM on certification depth, global account management, and product roadmap signaling.
• Hitachi Energy (ABB Grid Integration legacy): Global incumbent in power transmission and distribution equipment, including HV switchgear, GIS, transformers, and insulation components. Competes with SIPREM at the system level — many SIPREM insulator products integrate into Hitachi Energy reference designs — but with vastly broader portfolio and global reach.

Emerging players

• Wecsys Polymere / Angst+Pfister Group (silicone part makers): European technical polymer and silicone component suppliers serving electrical insulation, railway, and energy customers. Comparable in LSR (liquid silicone rubber) molding capability and silicone sleeve / molded insulating parts that overlap with SIPREM's silicone product line (sleeves up to 245 kV, outdoor bushings, coating services).

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/siprem

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 SIPREM