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This section provides an overview for insulation covers as well as their applications and principles. Also, please take a look at the list of 15 insulation cover manufacturers and their company rankings. Here are the top-ranked insulation cover companies as of January, 2025: 1.NICHIFU TERMINAL INDUSTRIES CO., LTD./NICHIFU CO., LTD., 2.Natraj Insulation, 3.Brock Group.
Table of Contents
Insulation covers are safety protective covers used to insulate and protect the charging section of fixtures, the wiring section, and the exposed charging section of high-voltage overhead distribution line clamps.
There are three types of covers: a one-touch push type that is pushed into an outlet, a type that is fitted by passing an electric wire through it, and a heat-shrink type that is covered over the charging section of a fixture and shrunk by a hair dryer or the like. Types that are used by cutting them according to the length of the terminal block.
Since they are safe and protective goods, it is important to select the appropriate cover for the applicable part, considering the material, terminal block standards, outer diameter of the applicable wire, operating voltage, insulation resistance, and other factors.
Insulation Covers are widely used in electrical work, machine repair, maintenance of construction equipment and machinery, communication equipment, home appliances, automobiles, motorcycles, etc.
Examples of use are as follows:
Insulation Covers made of ABS resin, polyolefin, etc. are used for medium-voltage power supply connections and conductor connections of less than 300 V, such as charging sections, joints, bolt sections, support connections, etc. of one-touch push type for outlets and simple structures.
Heat-shrinkable tubing is also available, in which the charging and wiring parts of the device are covered so that they are not exposed, and then heat-shrinked with a gas torch, industrial dryer, etc.
The applicable current for the heat-shrinkable tube specification is 100A, and the voltage is 600V. The insulating cover that protects the tip of the power cable with the terminal from short circuits is made of 0.4 mm thick polyurethane with a double structure and a solid adhesive treatment. Not too hard, not too soft, it has an exquisite hardness, so it feels good to use, and is transparent so you can check the polarity and phase of the cable.
Terminal insulating covers such as battery terminal insulating rubber covers are made of flexible PVC material. The red and black colors help prevent accidental shorts and improve the appearance of your wiring.
Widely used in communication equipment, home appliances, automobiles, motorcycles, etc. Insulating covers for high-voltage distribution lines such as steel towers for transmission lines, dead-end clamps for high-voltage overhead distribution lines, sleeve and connector connection points, branches for low-voltage overhead distribution lines, and wire connections for secondary terminals of pole transformers.
Polyethylene, which has high insulation, flexibility, durability, and weather resistance, is mainly used.
Covers designed with the shape and structure appropriate for each usage area can be used to improve work efficiency.
*Including some distributors, etc.
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Brock Group is a manufacturer of insulation covers and provider of industrial specialty services, founded in 1947 and headquartered in Houston, Texas. The company supports routine maintenance, turnarounds, and capital projects by providing services including scaffolding and work access, insulation, coatings and linings, and asbestos abatement. Its product line consists of removable insulation covers and metal insulation jackets. The company has over 17 worksites with VPP STAR certifications from OSHA. It serves diverse industries, including petrochemicals, power generation, heavy manufacturing, pipelines, and pulp and paper across the United States and Canada.
NICHIFU TERMINAL INDUSTRIES CO., LTD./NICHIFU CO., LTD., established in, Japan, in 1941 is a manufacturer of electrical products. Their products range include solderless terminals, indoor electrical wiring, connectors and power line connection that are produced with the accordance of Japanese Industrial Standards. In 1967 the company opened new factory and head office in Tsurumi, Osaka for rationalized production and development of new products and they have distributions and service all around the world.
Thermal Insulation Covers Ltd. is a designer and manufacturer of insulation covers, incorporated in 2010 and headquartered in Worcestershire, United Kingdom. The company specializes in the development, production, and installation of insulation covers. Its valve and flange jackets are designed to save energy and heating costs, offer frost and weather protection, and provide burn protection up to 1000°C. The company also provides foil-face insulation covers, high-temperature exhaust covers, plate heat exchanger covers, wastewater treatment covers, and external insulation covers. It serves the oil and gas, power generation, food and beverage, and chemical industries.
DongGuan RedsAnt Energy Saver Limited is a manufacturer and provider of plastic machine energy-saving solutions established in 2004 and headquartered in Guangdong, China. The company specializes in the production of thermal insulation jackets for injection molding machines, extruders, and other plastic equipment. It also offers pipe insulation, valve thermal insulation, flange thermal insulation, aerogel insulation, and fiberglass insulation. The company's products are designed to reduce energy consumption, improve start-up time, and lower ambient temperatures in plastics processing facilities. It exports to other countries across the US, Europe, and Southeast Asia, serving the plastics processing, automotive, electronics, and manufacturing industries.
KLAY EnerSol is a manufacturer of removable insulation covers founded in 2010 and headquartered in Selangor, Malaysia. The company mainly produces removable insulation covers, aerogel insulation, and various insulation materials and accessories. It also offers passive fire protection solutions, including jackets, panels, and blankets, as well as bellows, seals for furnaces and boilers, and heat shields. The company’s products are sold across the Southeast Asia region, including Malaysia, Singapore, and Indonesia. It is a member of the Energy Industries Council and caters to the petrochemical, oil and gas, power generation, marine, and manufacturing industries.
Advance Thermal Corp. is a manufacturer of insulation covers, jackets, and blankets, established in 1987 and headquartered in Wood Dale, Illinois. The company’s flagship product is the HEATAINER removable valve and pump cover. It also offers a wide range of other insulation products, including blankets for steam and gas turbines, acoustical covers for fans, silencers, and exhaust systems, along with removable insulation for nuclear power plants and OEM applications. The company serves various industries, including power generation, oil and gas, petrochemicals, pharmaceuticals, and manufacturing.
ThermoWrap, a division of Firwin Corporation, based in Canada, is a manufacturer of custom insulation products, was established in 1982. The company’s product, ThermoWrap, is used globally in plants, refineries, tank farms, terminals and on offshore assets as a pressure-containing repair to seal leaks and as a reinforcing repair to restore the strength of a pipe in the axial and circumferential directions. It is ideal for repairs involving complicated geometry, including tees, flanges, and varying diameter pipe. Its products are available in multiple kit sizes for any temperature and diameter pipe and can be installed with minimal disruption to operations.
Natraj Insulation is a manufacturer and exporter of a wide range of insulation materials, established in 1993 and headquartered in Gujarat, India. The company offers insulation jackets, industrial resin-bonded slabs, insulation pipes, bonded fiberglass wool rolls, and polyurethane floor coating systems. It also provides insulation services like thermal lagging insulation, dish-end insulation, and more. The company is IndiaMART-verified and exports to various countries, such as Nepal, Qatar, Australia, Israel, and Bangladesh. It is also ISO 9001-certified, serving the petrochemicals, power generation, chemicals, and other industrial sectors.
Heat Care Insulation is a manufacturer and exporter of removable insulation systems, established in 2012 and headquartered in Maharashtra, India. The company specializes in the production of removable insulation covers, industrial bellows, cables, and hose protection sleeves. It offers turbine and boiler insulation covers, fabric expansion joints, SNS sliding head machines, industrial tapes, and ceramic fiber modules. The company is IndiaMART-verified and exports products to several countries across the Middle East, Africa, Southeast Asia, Europe, and America. It caters to a wide range of industries, including power generation, petrochemicals, metals and mining, and food and beverages.
Shinagawa Shoko Co., Ltd., founded in 1959 with headquarters in Japan, is a manufacturer of insulation components for electrical wiring and circuit boards. The company's products range from insulator sleeves and insulator caps to protective material for electrical wiring, EMC components, and crimped terminals. Shinagawa Shoko Co., Ltd.’s components are used by OEM manufacturers and various industries worldwide and can be found in many electric and electronic devices and systems, such as wiring electrical systems in building construction. The company has partners around the globe that include All Electronics Hardware, Inc., Thora Electronik GmbH, and Honami Co., Ltd.
OHM ELECTRIC CO., LTD, founded in 1961 and headquartered in Hamamatsu, Japan, is a manufacturer specializing in wiring accessories, as well as temperature and environmental control devices. OHM offers various wiring accessories including cable glands, insulation caps, and junction boxes. To meet the requirements for maintaining a clean work environment, especially in manufacturing sites, the company provides a range of coolers, dehumidifiers, and condensate evaporators for indoor temperature and humidity control, as well as oil mist and dust collectors. Moreover, OHM offers system integrations with regard to electrical engineering solutions and automated machinery for various industries, including medical, food, and robotics.
Nataraj Insulation, established in 1992 and headquartered in Gujarat, India, is an ISO 9001-certified manufacturer and supplier of a wide range of insulation products. The company offers insulation mattresses, pipe-lagging insulation, removable insulation jackets, resin-bonded slabs, and aluminum cladding. It also provides thermal insulation, specialized wall insulation, and insulation coating services. The company is a member of the Ishrae Acoustic Society of India, exports to over 20 countries worldwide, and serves diverse sectors, including petroleum, power generation, fertilizer, and more.
Unionfull Group Ltd. is a manufacturer and supplier of thermal insulation and heat-resistant materials, established in 2014 and headquartered in Zhejiang, China. The company mainly produces fiberglass fabrics, high-silica fabrics, Kevlar Aramid fabrics, and PVC-coated fiberglass fabrics. It also offers thermal insulation covers, fiberglass needle mats, and fire-proof document bags. The company is ISO 9001:2008-certified and serves various industries, including petrochemicals, power generation, cement, pharmaceuticals, and chemicals. It exports products to over 50 countries across America, Europe, Asia, the Middle East, and Oceania.
Economy Engineering Corporation, established in 1965 and headquartered in Mumbai, India, is a manufacturer and supplier specializing in electrical heaters, temperature sensors, and control systems. The company's product range includes flexible surface heaters, drum heaters, heat tracing wires and controls, immersion heaters, removable insulation covers for energy savings, and more. These products find applications across various industries, including loading and unloading systems, automotive, laboratory equipment, valves and piping, glue machines, and more. The company serves a diverse clientele, including brands like Jindal Stainless, Netel India Limited, Voltas Limited, Positive Packaging Industries Limited, Mangalam Cement Ltd., and others.
Ranking as of January 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | NICHIFU TERMINAL INDUSTRIES CO., LTD./NICHIFU CO., LTD. |
15.0%
|
| 2 | Natraj Insulation |
10.0%
|
| 3 | Brock Group |
10.0%
|
| 4 | DongGuan RedsAnt Energy Saver Limited |
10.0%
|
| 5 | American Electric Co., Ltd. |
10.0%
|
| 6 | Nataraj Insulation |
5.0%
|
| 7 | Thermal Insulation Covers Ltd |
5.0%
|
| 8 | KLAY EnerSol |
5.0%
|
| 9 | Advance Thermal Corp. |
5.0%
|
| 10 | Unionfull Group Ltd. |
5.0%
|
Derivation Method
The ranking is calculated based on the click share within the insulation cover page as of January 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
Japan
|
4 | 40.0% |
|
China
|
2 | 20.0% |
|
India
|
2 | 20.0% |
|
United States of America
|
1 | 10.0% |
|
United Kingdom
|
1 | 10.0% |
89 products found
89 products
Shinagawa Shoko Co., Ltd.
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Resin insulation sleeve Used to cover bolts.
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Standard Response
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Denka Electron
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Upper and lower insulation covers for welding rod holders
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Upper insulation cover for EA315-1 Cable & clip for welding machine EA315-7
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