- General Plastics Corporation
 - Applicators of fluoropolymer, teflon, and other plastic coatings to provide non-stick, corrosion protection, lubrication, electrical insulation, and decorative properties for customers' parts. - En-Liang Enterprise Co., Ltd.
- Specializes in BMC and epoxy insulation material, CHV & LV electrical insulators, C-Electronic and electrical insulation, and OEM and ODM Parts.
- Gund Company
- Fabricates electrical and thermal insulation materials utilitized as components for power systems equipment, including generators, transformers, switchgear, motors, and electric furnaces.
- Custom Materials, Inc.
- Manufacturer of electrical insulation for transformers, motors, and other compenents made from glass polyester, glass melamine, glass epoxy, pressboard, and other non-metallics.
- Sungwon Electric Co., Inc.
- Manufacturer of electrical insulating materials.
- Damerius GmbH & Co.
- Manufactures electrical insulation sleeves for a variety of applications.
- Chem-Spec Corporation
- Manufacturer of electrical insulation products. The Chem-Spec Corporation is a privately owned company with technical expertise in the development of electrical insulating materials and the chemical manufacturing of these highly specialized products.
- Active Industries, Inc.
- Manufacturer and distributor of electrical insulation products and wire used primarily by original equipment manufacturers and motor repair shops.
- Electro Insulation Corporation
- Distributor of electrical tubing insulation, custom printed tubing and sleeving, and precision tape slitting.
- Isolants de l'Est
- (IDE) offers a range of electrical and thermal insulation.
- Lydall, Inc.
- Manufacturer of air and liquid filters and thermal and electrical insulation.
 Weidmann Industries
- Manufacturer of electrical insulation products. Weidmann Industries serves the electrical, electronic, telecommunications, transportation, and transformer markets, specializing in non-metallic composite and plastic fabrication products.- Perma-Mark Industries, Inc.
- Distributes heat shrinkable electrical insulation and offers hot stamp labeling of tubing.
- Fine Finish Organics
- Sells marine chemicals, electrical insulation materials, and corrosion protection coatings.
- Strike Marketing
- Importer-exporter and supplier of adhesive tape including packaging, electrical insulation, fluoroplastic, and other kinds of tapes.
- Red Seal Electric Company
- Global thermal insulation company. Fabricator and distributor of high temperature insulation and electrical insulating materials for industrial insulation.
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