The manufacture of electrical insulation components for switchgear represents the core of The Gund Company. Switchgear is made up of a combination of electrical switches and fuses or circuit breakers that are used to isolate, control, and protect electricity distribution to the end equipment. The gear is typically classified by operating voltage and fall into the following three categories: low voltage < 1kV AC, medium voltage 1 – 75 kV AC, and high voltage 75 – 230 kV AC.

Low voltage switchgear is located in buildings and consists of circuit breakers, disconnects, power distribution centers and meter housings. Medium voltage switchgear includes pad mount cabinets, circuit breakers, and large motor control centers. Most high voltage switchgear is operated at outdoor substations and utilizes air as the primary insulator.

As an integrated manufacturer of NEMA Grade GPO-3 Glass Polyester Laminate, The Gund Company supplies phase barriers, pultruded GPO-3 angle and channel, bus duct windows, and bus supports. We also manufacture our proprietary PolyPro FR Flame Retardant Polypropylene, water resistant insulation for motor control centers, watt-hour meters, and power supplies.

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Power Electronics Applications

Modern power electronics equipment involves the use of solid state electrical devices to control and convert electrical power. Most of these systems employ devices such as diodes, thyristors, and power IGBTs. The conversion equipment is classified by the type of input and output power. The four categories include rectifiers (AC to DC), inverters, (DC to AC), and converters (AC to AC or DC to DC). As power requirements have increased and design envelopes have decreased, the need for cost-effective, high-performance electrical insulation has intensified.

As a vertically integrated manufacturer of insulation materials, The Gund Company supplies NEMA Grade GPO-3 Glass Polyester Laminate (UPGM 203) glass polyester laminate for power inverters, converters, and storage devices. We also manufacture our proprietary PolyPro FR Flame Retardant Polypropylene, water resistant insulation for board liners, bus bar covers, and power supplies

Click Learn More to learn about the products and materials we offer for the Power Electronics markets.

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The Gund Company is a world leader in electrical insulation components for the manufacture and repair of power generators. There are a variety of types of generators: Turbine Generators, Hydro Generators, Wind Generators, Generator Sets, and other specialty applications. These Generators operate in a multitude of environmental conditions, so it is important to understand temperature and plant location when designing an appropriate insulation system. In addition to the operating environment, one must also consider the electrical load (kW, kVA, etc.) and application (emergency, prime, peaking, or continuous and base load power) of the generator in the design process.

The Gund Company manufactures and fabricates a complete line of electrical insulation and elastomeric (gasket) components for generator applications. We offer a full line of generator insulation materials and fabricated parts for all makes, models, types, and OEM’s of generators.

For decades, we have listened and learned what it takes to serve our customers’ generator insulation systems and elastomeric material needs. We are proud to offer world class customer service, reverse engineering, and application knowledge to generator OEM and repair/service companies. Click the learn more box below to learn about the products and services we offer for generator insulation.

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Electric motors convert electrical energy into mechanical energy. The Gund Company manufactures and fabricates a complete line of electrical insulating components for electric motors. We specialize in motor topsticks, wedges, and pole collars.

In motor repair situations, the most commonly required spare parts include insulation components. The Gund Company can supply individual components or complete kits for your motor repair project. We are an independent source for insulation and elastomeric (gasket) materials and components for all AC and DC motor types.

The Gund Company produces motor spare parts from OEM drawings, or we can reverse engineer customer-provided samples. In addition to our full range of capabilities, our focused experience in motor applications allows our customers to find practical solutions to their application requirements. We manufacture custom components from thermoset composite materials, focusing on custom composite solutions with the shortest lead-times in the industry. Our technical knowledge of thermoset composites, electrically insulating materials, and years of application experience makes The Gund Company the perfect source for engineered material solutions.

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Transformers can be found everywhere along the electrical grid from the power plant to our homes and offices. The primary purpose of a transformer is to increase or lower the voltage. The voltage changes as it flows through coils wound around steel cores. This demanding application requires a variety of quality electrical insulation materials.

The Gund Company manufactures and fabricates a complete line of electrical insulation and gasket components for transformer applications. We offer transformer insulation materials and fabricated parts for large Power Transformers, Distribution Transformers, and Dry-Type Transformers.

For decades, we have listened and learned what it takes to serve our customers’ transformers insulation material, and elastomeric sealing material needs. We are proud to offer world class customer service and application knowledge to both OEM’s and Repair / Service Companies that deal with Dry-Type and Oil-Filled Transformers. To learn more about the products and services we offer for transformer insulation materials, click the Learn More box below.

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Metals Processing

Several metallurgical processes make use of electrical energy to extract, heat treat, and shape metals. Naturally, the equipment utilized in these processes require high temperature, electrically insulating materials with excellent mechanical strength and, in some cases, chemical resistance.

The Gund Company manufactures and fabricates a complete line of electrical insulation and elastomeric sealing components for electric heating and melting applications. We specialize in providing custom fabricated insulating components for Electric Arc Furnaces, Induction Furnaces, and Smelting Pot Lines. We understand the demanding operating environment and parameters of metals processing applications and the materials capable of performing in such environments.

For decades, we have listened and learned what it takes to serve our customers’ electrical insulation material and elastomeric sealing needs. We are proud to offer world class customer service and application knowledge to both OEM’s and Repair / Service Companies that work with Electric Arc Furnaces, Induction Furnaces, and Smelting Applications. To learn more about the high temperature insulating and sealing products and services we offer for electrical insulation, click the Learn More box below.

MILWAUKEE Core Drill Speed Drilling Rig on Wheels(cc19


The Aerospace industry is defined as the branch of technology and industry concerned with aviation and space flight. The Gund Company is a vertically integrated manufacturer and fabricator of engineered material solutions for the Aerospace industry. More specifically, The Gund Company focuses on insulation, sealing, and wear components in the aeronautics, military, and space segments. We understand the Aerospace and Defense industry requires quality products and reliable delivery on a tight budget.

The Gund Company manufactures and fabricates a complete line of composite and elastomeric sealing components for the aerospace and defense industry. We specialize in providing custom fabricated components for the aeronautic, military, and space industries. We understand the critical nature of these components as well as the demand for tight tolerances.

For decades, we have listened and learned what it takes to serve our aerospace customers’ needs. We are proud to offer world class customer service and application knowledge to the aeronautics, military, and space industries. To learn more about the materials we offer these industries, or to request the latest version of our AS9100C or ISO9001:2015 certificates, click the Learn More box below.

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Oil & Gas

The Gund Company is a vertically integrated manufacturer and fabricator of engineered material solutions with over 65 years of experience using the latest technology and distinctive service.

We offer a broad range of composite, plastic and elastomeric materials and finished parts for all sectors of the Oil & Gas industry.

Our application engineering team specializes in key markets like exploration & extraction, oil and LNG transportation, storage, refining and distribution, and we are ready to help with your needs.

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Thermoset Rigid Composites

Thermoset rigid composites are composite materials in the “plastics” family. Generally speaking, plastic materials can be either thermoset or thermoplastic. By definition, thermoset materials maintain their dimensional stability at elevated temperatures while most thermoplastic material melt (or lose dimensional stability) at high temperatures.

Because thermoset composite materials maintain their dimensional stability at high temperatures, these materials work well in electrical insulating applications. Electrical equipment tends to generate a tremendous amount of heat due to the concentration of electrical wiring in a small space. The passage of electricity through electrical wires creates thermal energy or heat due to the resistance offered by copper or aluminum to the passage of electrons through their valence structures. Thus, the materials that insulate the copper or aluminum conductors must be able to withstand the thermal energy created without deforming or melting. For this reason, thermoset composite materials find common application in electrical equipment and other applications where dimensional stability at elevated temperatures is required.

By definition, composite materials are assembled by combining two or more materials. In the case of thermoset composites, a base material such as glass and cotton cloth serves as reinforcement. The reinforcement is held together with a thermosetting resin such as epoxy, phenolic, or melamine. Thermoset composite engineering, manufacturing, and fabricating is a core focus of The Gund Company.

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Thermoplastic Materials

Thermoplastic materials can be found at our every touch. The application of thermoplastic materials has been synonymous with modern technology. Though The Gund Company’s core focus continues to be thermoset composite materials, we also fabricate custom thermoplastic components by our customer’s requirements.

The Gund Company fabricates thermoplastic materials as a complement to our customer’s other thermoset component requirements. Typical examples include polycarbonate or acrylic sight windows for switchgear or transformer applications. Additionally, Teflon® material or PTFE is utilized as both a slip plane and relatively high-temperature thermoplastic. The Gund Company has also developed a specialty grade of flame retardant polypropylene, PolyPro FR® for the replacement of vulcanized fiber in electrical switchgear applications.

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Flexible Materials

Flexible materials can be homogeneous and heterogeneous in their makeup and can be made from a multitude of base materials. Flexible materials do not exhibit rigidity under normal conditions. In general, they cannot be machined, but are converted with standard processes. Materials that are considered to be flexible range from papers to elastomeric materials. The Gund Company manufacturers and converts a variety of flexible materials used in electrical and mechanical applications.

The Gund Company offers numerous flexible materials, custom designed to fit customer applications. To learn more about the materials we offer and their applications, click Learn More below.

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An elastomeric material is any material exhibiting elastic or rubber-like properties. Generally speaking, elastomeric materials are measured in material type, compound, and durometer (the hardness of the material). Since there are such a wide variety of elastomeric materials, the application is critical to understanding the best material compound for the job. The Gund Company offers a wide range of elastomeric materials that can be converted into an infinite number of shapes and sizes to meet your specific application.

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The Gund Company is a vertically integrated manufacturer and fabricator of engineered material solutions. Our team of research and development engineers focuses on developing materials that meet the electrical and mechanical requirements of our customer’s demanding applications. This includes, but is not limited to electrical insulation applications in transformers, switchgear, power electronics, and rotating equipment. The Gund Company utilizes a consultative approach to assist engineering teams with designing new equipment or servicing existing equipment. By partnering with industry leaders in the metals processing, oil & gas, aerospace, and industrial markets, we’ve learned how our materials can be utilized in applications beyond electrical insulation. Our team of application engineers works with customers in these markets to understand their needs and develop solutions that meet their most demanding electrical and mechanical requirements.

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