Company lists · Data refreshed October 2026

Top 25 Calcium silicate insulation manufacturers based in the United States

Name: Calcium silicate insulation manufacturers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 9, 2026 87 companies tracked

RevenueBase identified 87 company matches for calcium silicate insulation manufacturers associated with the United States as of October 2026 and tracks 2,345 professional contacts across them, including 855 with verified work emails. Charlotte is the largest hub.

This list covers company matches for calcium silicate insulation manufacturers 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 October 9, 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 Oct 9, 2026 How this list was built

87Companies

2,345Contacts tracked

855Verified emails

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The 25 largest calcium silicate insulation manufacturers based in the United States

Ranked by team size

Top 25 of 87 company matches for calcium silicate insulation manufacturers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 9, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	SPI	Exact match	Charlotte, NC, United StatesHQ recorded Oct 9, 2026	1,001-5,000	529 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 · Oct 9, 2026 · View company records in RevenueBase
2	Unifrax	Exact match	Tonawanda, NY, United StatesHQ recorded Oct 9, 2026	1,001-5,000	421 contacts →
	Exact match “At Unifrax, we provide innovative solutions to our customers' application problems across several different industries.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
3	NUTEC	Exact match	Huntersville, NC, United StatesHQ recorded Oct 9, 2026	201-500	219 contacts →
	Exact match “NUTEC is a leading manufacturer of superior quality, high-temperature insulation and fire protection products.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
4	Greenfiber	Exact match	Charlotte, United StatesHQ recorded Oct 9, 2026	201-500	157 contacts →
	Exact match “Established in and headquartered in Charlotte, N.C, Greenfiber is the largest manufacturer of cellulose insulation and fire and sound products.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
5	Johns Manville Industrial Insulation	Exact match	Denver, CO, United StatesHQ recorded Oct 9, 2026	201-500	146 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 · Oct 9, 2026 · View company records in RevenueBase
6	Silvercote	Exact match	Greenville, SC, United StatesHQ recorded Oct 9, 2026	51-200	121 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 · Oct 9, 2026 · View company records in RevenueBase
7	Plibrico Company	Exact match	Northbrook, IL, United StatesHQ recorded Oct 9, 2026	51-200	78 contacts →
	Exact match “Plibrico offers a full line of monolithic refractories, insulating firebrick and complementary refractory products.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
8	Pacor INC	Exact match	Bordentown, NJ, United StatesHQ recorded Oct 9, 2026	51-200	47 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 · Oct 9, 2026 · View company records in RevenueBase
9	Insul-Therm International INC	Exact match	Commerce, CA, United StatesHQ recorded Oct 9, 2026	51-200	39 contacts →
	Exact match “Insul-Therm Intl.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
10	L&l Insulations	Exact match	Des Moines, IA, United StatesHQ recorded Oct 9, 2026	51-200	27 contacts →
	Exact match “Since 1988 L&L Insulations has provided insulation products and specialty services to the manufacturing and construction industries throughout the Midwest.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
11	BNZ Materials	Exact match	Zelienople, PA, United StatesHQ recorded Oct 9, 2026	51-200	27 contacts →
	Exact match “BNZ Materials is a world leading manufacturer of specialty industrial insulation materials with over 16 types of Insulating FireBricks available for use in applications from to…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
12	Mt. Savage Specialty Refractories	Exact match	Ingomar, PA, United StatesHQ recorded Oct 9, 2026	51-200	26 contacts →
	Exact match “Founded in 1975, Mt.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
13	SMC Industries, INC	Exact match	Malvern, PA, United StatesHQ recorded Oct 9, 2026	11-50	22 contacts →
	Exact match “QUALITY & VALUE INNOVATION SERVICE EXCELLENCE Founded in 1979, SMC Industries, Inc.(formerly Sproule Manufacturing Company, Inc.) is a leading and innovative manufacturer of…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14	Extol Of Ohio, INC	Exact match	Norwalk, OH, United StatesHQ recorded Oct 9, 2026	51-200	20 contacts →
	Exact match “Extol of Ohio, Inc, the leader in fabricated insulation for refrigeration in business since 1985, has long been recognized as the leader in providing fabricated insulation systems…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15	GLT Products	Exact match	Solon, OH, United StatesHQ recorded Oct 9, 2026	201-500	19 contacts →
	Exact match “As a manufacturer, distributor and fabricator, GLT Products line of industrial insulation products are used worldwide in mechanical, thermal and acoustical insulation projects.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16	Chiz Bros Refractory And Insulation Specialists	Exact match	Elizabeth, PA, United StatesHQ recorded Oct 9, 2026	11-50	17 contacts →
	Exact match “Chiz Bros is a refractory and insulation company based in Pittsburgh Pennsylvania.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17	Thermal Control Products, INC	Exact match	Concord, NC, United StatesHQ recorded Oct 9, 2026	51-200	15 contacts →
	Exact match “Thermal Control Products specializes in the custom design and execution of a wide variety of thermal and protective components.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18	Ceramsource, INC	Exact match	Beaver Falls, PA, United StatesHQ recorded Oct 9, 2026	11-50	14 contacts →
	Exact match “CeramSource is a unique supplier of high quality, refractory, fiber insulation, and graphite products.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19	Fire Brick Engineers	Exact match	Milwaukee, WI, United StatesHQ recorded Oct 9, 2026	51-200	14 contacts →
	Exact match “Fire Brick Engineers is the leader in the manufacture and distribution of the refractory products, as well as refractory construction services, furnace tear out and repair, and…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
20	The Christy Refractories Company, L.L.C	Exact match	St. Louis, MO, United StatesHQ recorded Oct 9, 2026	11-50	11 contacts →
	Exact match “The Christy family of companies has been providing industrial ceramic minerals and finished products to industry since the early 1800's.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
21	Victor Insulators INC	Exact match	Victor, NY, United StatesHQ recorded Oct 9, 2026	51-200	10 contacts →
	Exact match “Victor manufactures the widest product line of any North American insulator manufacturer.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
22	Thermal Pipe Shields	Exact match	Stanwood, WA, United StatesHQ recorded Oct 9, 2026	51-200	8 contacts →
	Exact match “From humble beginnings, TPS has grown to become the largest fabricator of insulated pipe supports North America.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
23	Enhanced Mechanical Systems	Exact match	Colorado Springs, United StatesHQ recorded Oct 9, 2026	11-50	8 contacts →
	Exact match “Welcome to Enhanced Mechanical Systems, Colorado's trusted partner for commercial mechanical and industrial insulation solutions for more than 20 years.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
24	Joy-Mark INC	Exact match	Cudahy, WI, United StatesHQ recorded Oct 9, 2026	51-200	8 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
25	Lynn Manufacturing, INC	Exact match	Lynn, MA, United StatesHQ recorded Oct 9, 2026	11-50	8 contacts →
	Exact match “Providing solutions to your high temperature insulating and sealing needs.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “calcium silicate insulation manufacturers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 87 calcium silicate insulation manufacturers based in the United States

See the full list, filter by size, metro and specialty, and access 855 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Calcium silicate insulation manufacturers based in the United States at a glance

As of Oct 9, 2026

36.5%Verified-email coverage

27.0Average contacts per company

11-50Median size (employees)

5.7%Largest-city concentration · Charlotte

Oct 9, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

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 87 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 “calcium silicate insulation manufacturers” 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 855 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 October 9, 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 “calcium silicate insulation manufacturers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many calcium silicate insulation manufacturers are there based in the United States?

RevenueBase identified 87 company matches for calcium silicate insulation manufacturers associated with the United States as of October 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?

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

Which city has the most calcium silicate insulation manufacturers?

Charlotte leads with 5 company records, followed by Cleveland (3) and Denison (2).

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 855 professional contacts with verified work emails tracked across these 87 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 October 9, 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.