Company lists · Data refreshed November 2026

Top 25 Switchgear insulation suppliers based in the United States

RevenueBase identified 358 company matches for switchgear insulation suppliers associated with the United States as of November 2026 and tracks 9,677 professional contacts across them, including 2,495 with verified work emails. Houston is the largest hub.

This list covers company matches for switchgear insulation suppliers associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 2, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 2, 2026 How this list was built
358Companies
9,677Contacts tracked
2,495Verified emails
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The 25 largest switchgear insulation suppliers based in the United States

Ranked by team size
Top 25 of 358 company matches for switchgear insulation suppliers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 2, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSouthfield, MI, United StatesHQ recorded Nov 2, 202610001+2,260 contacts →

Exact match

“Founded in 1953, Electrical Components International (ECI) is one of the world’s leading suppliers of electrical distribution systems, control box assemblies, and other critical…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
2Exact matchCharlotte, NC, United StatesHQ recorded Nov 2, 20261,001-5,000529 contacts →

Exact match

“SPI is a global leader in the Distribution and Specialty Fabrication of insulation products for Thermal, Acoustic, Fire Protection and Refractory applications.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
3Exact matchHouston, TX, United StatesHQ recorded Nov 2, 20261,001-5,000484 contacts →

Exact match

“Distribution International (DI) a leading distributor of thermal and acoustical insulation and related supplies for maintenance and repair operations in the United States.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
4Exact matchMedford, MA, United StatesHQ recorded Nov 2, 2026501-1,000342 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
5Exact matchHarahan, LA, United StatesHQ recorded Nov 2, 20261,001-5,000229 contacts →

Exact match

“Founded in New Orleans, LA in 1970, Insulations, Inc.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
6Exact matchCincinnati, OH, United StatesHQ recorded Nov 2, 2026501-1,000205 contacts →

Exact match

“For over 50 years, Monti Inc.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
7Exact matchSpokane, WA, United StatesHQ recorded Nov 2, 2026201-500166 contacts →

Exact match

“Stoneway Electric Supply Company was founded in 1974 at the original location in Seattle Washington on Stone Way.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
8Exact matchDenver, CO, United StatesHQ recorded Nov 2, 2026201-500146 contacts →

Exact match

“JM is the leading manufacturer of thermal insulation solutions for high and low-temperature industrial applications.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
9Exact matchYoungsville, NC, United StatesHQ recorded Nov 2, 2026201-500146 contacts →

Exact match

“K-FLEX USA is the North American division of the IK Insulation Group, an innovative leader in flexible elastomeric foam insulation with 12 production facilities worldwide and a…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
10Exact matchNorth Canton, OH, United StatesHQ recorded Nov 2, 20261,001-5,000126 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
11Exact matchGreenville, SC, United StatesHQ recorded Nov 2, 202651-200121 contacts →

Exact match

“Silvercote, a Service Partners company, manufactures high-quality metal building insulation products customized to project specifications.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
12Exact matchAddison, TX, United StatesHQ recorded Nov 2, 202610001+113 contacts →

Exact match

“NOARK Electric is a global manufacturer and supplier of low, medium and high voltage electrical components for industrial and commercial applications.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
13Exact matchWaco, TX, United StatesHQ recorded Nov 2, 20261,001-5,000107 contacts →

Exact match

“Chaparral Insulation has proudly served the mechanical insulation industry for more than 30 years.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
14Exact matchDenver, CO, United StatesHQ recorded Nov 2, 2026201-50099 contacts →

Exact match

“With over 60 years of experience, ESS Metron has manufactured the highest quality electrical switchgear solutions for the most demanding applications and environments known.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
15Exact matchThe Woodlands, TX, United StatesHQ recorded Nov 2, 2026201-50092 contacts →

Exact match

“Epsilyte is one of North America’s leading producers of advanced insulative materials.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
16Exact matchMemphis, TN, United StatesHQ recorded Nov 2, 2026n/a76 contacts →

Exact match

“Bringing the Power of Electricity into Your Life Every day, everywhere, hundreds of millions of electrical products get plugged in.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
17Exact matchSan Leandro, CA, United StatesHQ recorded Nov 2, 202651-20064 contacts →

Exact match

“Trayer Engineering Corporation is a pioneer and global leader in the design and manufacture of maintenance-free vacuum switchgear for electrical distribution systems.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
18Exact matchGreen Bay, WI, United StatesHQ recorded Nov 2, 2026201-50062 contacts →

Exact match

“Bay Insulation Systems is the leading supplier of metal building insulation and systems in North America.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
19Exact matchBessemer, AL, United StatesHQ recorded Nov 2, 202651-20060 contacts →

Exact match

“Royal Switchgear, a MacLean Power Systems (MPS) company, is a leading provider of high voltage disconnect switches, hookstick switches, and specialty switchgear solutions.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
20Exact matchGainesville, TX, United StatesHQ recorded Nov 2, 202651-20056 contacts →

Exact match

“Founded in 1981, Circuit Breaker Sales specializes in the sale and service of low- and medium-voltage circuit breakers and other switchgear as well as electrical power…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
21Exact matchRichfield, OH, United StatesHQ recorded Nov 2, 202651-20050 contacts →

Exact match

“Winar Connection, Inc.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
22Exact matchLake Zurich, IL, United StatesHQ recorded Nov 2, 202651-20050 contacts →

Exact match

“Founded in 1958, The Nelson Companies is a family of independently operated specialty contracting businesses serving commercial, industrial, healthcare, education, manufacturing…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
23Exact matchMount Bethel, PA, United StatesHQ recorded Nov 2, 2026201-50049 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
24Exact matchBordentown, NJ, United StatesHQ recorded Nov 2, 202651-20047 contacts →

Exact match

“With fabricating facilities in New Jersey, North Carolina and Georgia, Pacor custom fabricates and distributes fiberglass, aerogel, ceramic and foam industrial insulation products…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
25Exact matchCoppell, TX, United StatesHQ recorded Nov 2, 2026201-50044 contacts →

Exact match

“Concote Corporation is a privately-held manufacturer and distributor, headquartered in Coppell, Texas.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase

Showing 25 of 358 switchgear insulation suppliers based in the United States

See the full list, filter by size, metro and specialty, and access 2,495 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Switchgear insulation suppliers based in the United States at a glance

As of Nov 2, 2026
25.8%Verified-email coverage
27.0Average contacts per company
11-50Median size (employees)
3.1%Largest-city concentration · Houston
Nov 2, 2026Page data refreshed

Companies by employee count

1-10
114
11-50
138
51-200
64
201-500
18
501-1,000
8
1,001-5,000
9
10001+
6

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 358 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “switchgear insulation suppliers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 2,495 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on November 2, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “switchgear insulation suppliers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many switchgear insulation suppliers are there based in the United States?

RevenueBase identified 358 company matches for switchgear insulation suppliers associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Electrical Components International tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most switchgear insulation suppliers?

Houston leads with 11 company records, followed by Denver (5) and Los Angeles (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,495 professional contacts with verified work emails tracked across these 358 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 2, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.