Company lists · Data refreshed October 2026
Top 25 Passive firestop system suppliers based in the United States
RevenueBase identified 73 company matches for passive firestop system suppliers associated with the United States as of October 2026 and tracks 952 professional contacts across them, including 326 with verified work emails. Houston is the largest hub.
This list covers company matches for passive firestop system 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 October 28, 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.
The 25 largest passive firestop system suppliers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 194 contacts → | ||||
Exact match “For over 30 years, our team has worked hand in hand with the construction industry to create simple solutions to complex firestopping problems.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 2 | 141 contacts → | ||||
Exact match “Isolatek, originally established in 1875 as a manufacturer of mineral wool, is today a global leader in the development, manufacture, and distribution of proprietary Passive Fire…” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 3 | 66 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 4 | 39 contacts → | ||||
Exact match “National Firestopping Solutions (NFS) is the industry's premier Factory Mutual (FM) 4991 & Underwriters Laboratory (UL) approved full-service firestopping contractor.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 5 | 26 contacts → | ||||
Exact match “Welcome to West Coast Firestopping, Inc!” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 6 | 23 contacts → | ||||
Exact match “Superior Industrial Insulation Company was founded by Thomas Dake and Martin Delaney on March 1, 1980.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 7 | 22 contacts → | ||||
Exact match “Gleeson Powers is a specialty commercial contractor, offering firestopping and other passive fire protection solutions as well as air & vapor barrier, waterproofing, caulking and…” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 8 | 16 contacts → | ||||
Exact match “For the past two decades, CMI has provided top quality services in mechanical insulation and firestopping to government entities, public institutions, and privately held companies…” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 9 | 14 contacts → | ||||
Exact match “American National Insulation & Sealants is a construction company based out of 3800 ARNO ST NE, Albuquerque, New Mexico, United States.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 10 | 12 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 11 | 10 contacts → | ||||
Exact match “No-Burn, Inc.(NBI) is a building material manufacturer producing, selectively distributing, and technically supporting their products.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 12 | 9 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 13 | 8 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 14 | 8 contacts → | ||||
Exact match “FireWise Consultants is a one of a kind consulting firm that focuses on the Passive Fire Protection industry with a specialization in Firestop.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 15 | 6 contacts → | ||||
Exact match “International Fireproof Technology Inc.(IFTI) manufactures state of the art intumescent fire retardants, thermal barrier coatings and firestop products.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 16 | 5 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 17 | 4 contacts → | ||||
Exact match “At Rocky Mountain Firestop we can address all of your firestopping needs in a clean and professional way.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 18 | 4 contacts → | ||||
Exact match “Karcher Interior Systems provides firestopping applications including: installation of penetration protection, top and bottom of wall joint protection, edge of slab and curtain…” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 19 | 3 contacts → | ||||
Exact match “Performance Firestop specializes in the complexities of installations and restores confidence in the effectiveness of fire-rated barriers for contractors, authorities having…” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 20 | 3 contacts → | ||||
Exact match “QUALITY.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 21 | 3 contacts → | ||||
Exact match “Summit Contracting, LLC is a construction company delivering high-quality service – cost-efficiently and safely – time and again.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 22 | 3 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 23 | 3 contacts → | ||||
Exact match “Thru-Wall Construction is a single-source firestop contractor serving the Boston area.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 24 | 3 contacts → | ||||
Exact match “Specialty Firestop Systems is a construction company based out of Portland, Oregon, United States.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase | |||||
| 25 | 3 contacts → | ||||
Exact match “Phoenix Firestop provides code compliant installations of penetration and joint firestop systems.” Recorded in the RevenueBase company graph · Oct 28, 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 “passive firestop system suppliers”. 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 73 passive firestop system suppliers based in the United States
See the full list, filter by size, metro and specialty, and access 326 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Passive firestop system suppliers based in the United States at a glance
As of Oct 28, 2026Companies by employee count
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 73 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 “passive firestop system 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 326 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 28, 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 “passive firestop system suppliers”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many passive firestop system suppliers are there based in the United States?
RevenueBase identified 73 company matches for passive firestop system suppliers 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?
Specified Technologies Inc. STI Firestop tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most passive firestop system suppliers?
Houston leads with 4 company records, followed by Portland (3) and Green Bay (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 326 professional contacts with verified work emails tracked across these 73 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 28, 2026.
Ready to reach these companies? Verified emails and direct dials for all 73 passive firestop system suppliers based in the United States. Start with a free account, no credit card.
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Passive firestop system suppliers by geography
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.
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Company intelligence · public preview
Top 25 passive firestop system suppliers based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 73 matching company records for passive firestop system suppliers based in the United States, with 952 tracked contacts and 326 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 28, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 passive firestop system suppliers based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Specified Technologies Inc. STI Firestopstifirestop.com HQ: Somerville, NJ, United StatesReported employees: 201-500 | Somerville, NJ, United States | 201-500 | Exact match | 194 contacts → |
“For over 30 years, our team has worked hand in hand with the construction industry to create simple solutions to complex firestopping problems.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Isolatek Internationalisolatek.com HQ: Stanhope, NJ, United StatesReported employees: 51-200 | Stanhope, NJ, United States | 51-200 | Exact match | 141 contacts → |
“Isolatek, originally established in 1875 as a manufacturer of mineral wool, is today a global leader in the development, manufacture, and distribution of proprietary Passive Fire…” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | FGH Insulation COfghinsulation.com HQ: Houston, TX, United StatesReported employees: 51-200 | Houston, TX, United States | 51-200 | Exact match | 66 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 4 | National Firestopping Solutionsnefirestop.com HQ: Saco, ME, United StatesReported employees: 51-200 | Saco, ME, United States | 51-200 | Exact match | 39 contacts → |
“National Firestopping Solutions (NFS) is the industry's premier Factory Mutual (FM) 4991 & Underwriters Laboratory (UL) approved full-service firestopping contractor.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | West Coast Firestopping, INCwestcoastfirestop.com HQ: Orange, CA, United StatesReported employees: 51-200 | Orange, CA, United States | 51-200 | Exact match | 26 contacts → |
“Welcome to West Coast Firestopping, Inc!” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Superior Industrial Insulationsuperior-insulation.comHQ: Cleveland, OH, United StatesReported employees: 51-200 | Cleveland, OH, United States | 51-200 | Exact match | 23 contacts → |
“Superior Industrial Insulation Company was founded by Thomas Dake and Martin Delaney on March 1, 1980.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Gleeson Powers INCgleesonpowers.com HQ: Southborough, MA, United StatesReported employees: 51-200 | Southborough, MA, United States | 51-200 | Exact match | 22 contacts → |
“Gleeson Powers is a specialty commercial contractor, offering firestopping and other passive fire protection solutions as well as air & vapor barrier, waterproofing, caulking and…” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Cmi, INCcminsulation.com HQ: Englewood, CO, United StatesReported employees: 51-200 | Englewood, CO, United States | 51-200 | Exact match | 16 contacts → |
“For the past two decades, CMI has provided top quality services in mechanical insulation and firestopping to government entities, public institutions, and privately held companies…” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | American National Insulation & Sealantsamericannationalinsulation.com HQ: Albuquerque, NM, United StatesReported employees: 1,001-5,000 | Albuquerque, NM, United States | 1,001-5,000 | Exact match | 14 contacts → |
“American National Insulation & Sealants is a construction company based out of 3800 ARNO ST NE, Albuquerque, New Mexico, United States.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | JD Firestop Pros, INCjdfirestoppros.com HQ: Tracy, CA, United StatesReported employees: 11-50 | Tracy, CA, United States | 11-50 | Exact match | 12 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 11 | No-Burn, INCnoburn.com HQ: Wadsworth, OH, United StatesReported employees: 11-50 | Wadsworth, OH, United States | 11-50 | Exact match | 10 contacts → |
“No-Burn, Inc.(NBI) is a building material manufacturer producing, selectively distributing, and technically supporting their products.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | CR Insulation INCcrinsulation.com HQ: San Marcos, CA, United StatesReported employees: 51-200 | San Marcos, CA, United States | 51-200 | Exact match | 9 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 13 | Life Safety Solutions, INClifesafetysolutions.com HQ: Vancouver, WA, United StatesReported employees: 11-50 | Vancouver, WA, United States | 11-50 | Exact match | 8 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 14 | Firewise Consultants LLCfirewiseconsultants.com HQ: Dublin, CA, United StatesReported employees: 1-10 | Dublin, CA, United States | 1-10 | Exact match | 8 contacts → |
“FireWise Consultants is a one of a kind consulting firm that focuses on the Passive Fire Protection industry with a specialization in Firestop.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | International Fireproof Technologypainttoprotect.com HQ: Irvine, CA, United StatesReported employees: 11-50 | Irvine, CA, United States | 11-50 | Exact match | 6 contacts → |
“International Fireproof Technology Inc.(IFTI) manufactures state of the art intumescent fire retardants, thermal barrier coatings and firestop products.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Alva Tech INCalva-tech.com HQ: Burlington, NJ, United StatesReported employees: 11-50 | Burlington, NJ, United States | 11-50 | Exact match | 5 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 17 | Rocky Mountain Firestoprockymountainfirestop.com HQ: Elizabeth, CO, United StatesReported employees: 1-10 | Elizabeth, CO, United States | 1-10 | Exact match | 4 contacts → |
“At Rocky Mountain Firestop we can address all of your firestopping needs in a clean and professional way.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Karcher Interior Systems, INCkarcherint.com HQ: Orange, CA, United StatesReported employees: 11-50 | Orange, CA, United States | 11-50 | Exact match | 4 contacts → |
“Karcher Interior Systems provides firestopping applications including: installation of penetration protection, top and bottom of wall joint protection, edge of slab and curtain…” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Performance Firestop, INCperformance-firestop.com HQ: Green Bay, WI, United StatesReported employees: 11-50 | Green Bay, WI, United States | 11-50 | Exact match | 3 contacts → |
“Performance Firestop specializes in the complexities of installations and restores confidence in the effectiveness of fire-rated barriers for contractors, authorities having…” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | CFA Fireproofingcfafireproofing.com HQ: Apopka, FL, United StatesReported employees: 11-50 | Apopka, FL, United States | 11-50 | Exact match | 3 contacts → |
“QUALITY.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Summit Contracting, LLCsummitcontractingllc.com HQ: Portland, OR, United StatesReported employees: 11-50 | Portland, OR, United States | 11-50 | Exact match | 3 contacts → |
“Summit Contracting, LLC is a construction company delivering high-quality service – cost-efficiently and safely – time and again.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Commercial Fireproofingcommercialfireproofing.com HQ: Dallas, TX, United StatesReported employees: 1-10 | Dallas, TX, United States | 1-10 | Exact match | 3 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 23 | Thru-Wall Constructionthru-wall.com HQ: Allston, MA, United StatesReported employees: 1-10 | Allston, MA, United States | 1-10 | Exact match | 3 contacts → |
“Thru-Wall Construction is a single-source firestop contractor serving the Boston area.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Specialty Firestop Systemsspecialtyfirestop.com HQ: Portland, OR, United StatesReported employees: 11-50 | Portland, OR, United States | 11-50 | Exact match | 3 contacts → |
“Specialty Firestop Systems is a construction company based out of Portland, Oregon, United States.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Phoenix Firestopphoenixfirestop.com HQ: Portland, ME, United StatesReported employees: 1-10 | Portland, ME, United States | 1-10 | Exact match | 3 contacts → |
“Phoenix Firestop provides code compliant installations of penetration and joint firestop systems.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 73 company matches
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Passive firestop system suppliers: dataset insights
October 28, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
73 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 73 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 28, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for passive firestop system suppliers?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many passive firestop system suppliers did RevenueBase find based in the United States?
The saved snapshot records 73 matching company records, 952 tracked contacts and 326 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 28, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Passive firestop system suppliers by geography
Cite this list
RevenueBase Data Team. Top 25 passive firestop system suppliers based in the United States. Snapshot: October 28, 2026. https://revenuebase.ai/companies/passive-firestop-system-suppliers/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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Company intelligence · public preview
Top 25 passive firestop system suppliers based in the United States
RevenueBase records 73 matching company records for passive firestop system suppliers based in the United States, with 952 tracked contacts and 326 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 28, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 passive firestop system suppliers based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Specified Technologies Inc. STI Firestopstifirestop.com HQ: Somerville, NJ, United StatesReported employees: 201-500 | Somerville, NJ, United States | 201-500 | Exact match | 194 contacts → |
“For over 30 years, our team has worked hand in hand with the construction industry to create simple solutions to complex firestopping problems.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Isolatek Internationalisolatek.com HQ: Stanhope, NJ, United StatesReported employees: 51-200 | Stanhope, NJ, United States | 51-200 | Exact match | 141 contacts → |
“Isolatek, originally established in 1875 as a manufacturer of mineral wool, is today a global leader in the development, manufacture, and distribution of proprietary Passive Fire…” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | FGH Insulation COfghinsulation.com HQ: Houston, TX, United StatesReported employees: 51-200 | Houston, TX, United States | 51-200 | Exact match | 66 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 4 | National Firestopping Solutionsnefirestop.com HQ: Saco, ME, United StatesReported employees: 51-200 | Saco, ME, United States | 51-200 | Exact match | 39 contacts → |
“National Firestopping Solutions (NFS) is the industry's premier Factory Mutual (FM) 4991 & Underwriters Laboratory (UL) approved full-service firestopping contractor.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | West Coast Firestopping, INCwestcoastfirestop.com HQ: Orange, CA, United StatesReported employees: 51-200 | Orange, CA, United States | 51-200 | Exact match | 26 contacts → |
“Welcome to West Coast Firestopping, Inc!” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Superior Industrial Insulationsuperior-insulation.com HQ: Cleveland, OH, United StatesReported employees: 51-200 | Cleveland, OH, United States | 51-200 | Exact match | 23 contacts → |
“Superior Industrial Insulation Company was founded by Thomas Dake and Martin Delaney on March 1, 1980.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Gleeson Powers INCgleesonpowers.com HQ: Southborough, MA, United StatesReported employees: 51-200 | Southborough, MA, United States | 51-200 | Exact match | 22 contacts → |
“Gleeson Powers is a specialty commercial contractor, offering firestopping and other passive fire protection solutions as well as air & vapor barrier, waterproofing, caulking and…” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Cmi, INCcminsulation.com HQ: Englewood, CO, United StatesReported employees: 51-200 | Englewood, CO, United States | 51-200 | Exact match | 16 contacts → |
“For the past two decades, CMI has provided top quality services in mechanical insulation and firestopping to government entities, public institutions, and privately held companies…” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | American National Insulation & Sealantsamericannationalinsulation.com HQ: Albuquerque, NM, United StatesReported employees: 1,001-5,000 | Albuquerque, NM, United States | 1,001-5,000 | Exact match | 14 contacts → |
“American National Insulation & Sealants is a construction company based out of 3800 ARNO ST NE, Albuquerque, New Mexico, United States.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | JD Firestop Pros, INCjdfirestoppros.com HQ: Tracy, CA, United StatesReported employees: 11-50 | Tracy, CA, United States | 11-50 | Exact match | 12 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 11 | No-Burn, INCnoburn.com HQ: Wadsworth, OH, United StatesReported employees: 11-50 | Wadsworth, OH, United States | 11-50 | Exact match | 10 contacts → |
“No-Burn, Inc.(NBI) is a building material manufacturer producing, selectively distributing, and technically supporting their products.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | CR Insulation INCcrinsulation.com HQ: San Marcos, CA, United StatesReported employees: 51-200 | San Marcos, CA, United States | 51-200 | Exact match | 9 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 13 | Life Safety Solutions, INClifesafetysolutions.com HQ: Vancouver, WA, United StatesReported employees: 11-50 | Vancouver, WA, United States | 11-50 | Exact match | 8 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 14 | Firewise Consultants LLCfirewiseconsultants.com HQ: Dublin, CA, United StatesReported employees: 1-10 | Dublin, CA, United States | 1-10 | Exact match | 8 contacts → |
“FireWise Consultants is a one of a kind consulting firm that focuses on the Passive Fire Protection industry with a specialization in Firestop.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | International Fireproof Technologypainttoprotect.com HQ: Irvine, CA, United StatesReported employees: 11-50 | Irvine, CA, United States | 11-50 | Exact match | 6 contacts → |
“International Fireproof Technology Inc.(IFTI) manufactures state of the art intumescent fire retardants, thermal barrier coatings and firestop products.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Alva Tech INCalva-tech.com HQ: Burlington, NJ, United StatesReported employees: 11-50 | Burlington, NJ, United States | 11-50 | Exact match | 5 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 17 | Rocky Mountain Firestoprockymountainfirestop.com HQ: Elizabeth, CO, United StatesReported employees: 1-10 | Elizabeth, CO, United States | 1-10 | Exact match | 4 contacts → |
“At Rocky Mountain Firestop we can address all of your firestopping needs in a clean and professional way.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Karcher Interior Systems, INCkarcherint.com HQ: Orange, CA, United StatesReported employees: 11-50 | Orange, CA, United States | 11-50 | Exact match | 4 contacts → |
“Karcher Interior Systems provides firestopping applications including: installation of penetration protection, top and bottom of wall joint protection, edge of slab and curtain…” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Performance Firestop, INCperformance-firestop.com HQ: Green Bay, WI, United StatesReported employees: 11-50 | Green Bay, WI, United States | 11-50 | Exact match | 3 contacts → |
“Performance Firestop specializes in the complexities of installations and restores confidence in the effectiveness of fire-rated barriers for contractors, authorities having…” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | CFA Fireproofingcfafireproofing.com HQ: Apopka, FL, United StatesReported employees: 11-50 | Apopka, FL, United States | 11-50 | Exact match | 3 contacts → |
“QUALITY.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Summit Contracting, LLCsummitcontractingllc.com HQ: Portland, OR, United StatesReported employees: 11-50 | Portland, OR, United States | 11-50 | Exact match | 3 contacts → |
“Summit Contracting, LLC is a construction company delivering high-quality service – cost-efficiently and safely – time and again.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Commercial Fireproofingcommercialfireproofing.com HQ: Dallas, TX, United StatesReported employees: 1-10 | Dallas, TX, United States | 1-10 | Exact match | 3 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 23 | Thru-Wall Constructionthru-wall.com HQ: Allston, MA, United StatesReported employees: 1-10 | Allston, MA, United States | 1-10 | Exact match | 3 contacts → |
“Thru-Wall Construction is a single-source firestop contractor serving the Boston area.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Specialty Firestop Systemsspecialtyfirestop.com HQ: Portland, OR, United StatesReported employees: 11-50 | Portland, OR, United States | 11-50 | Exact match | 3 contacts → |
“Specialty Firestop Systems is a construction company based out of Portland, Oregon, United States.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Phoenix Firestopphoenixfirestop.com HQ: Portland, ME, United StatesReported employees: 1-10 | Portland, ME, United States | 1-10 | Exact match | 3 contacts → |
“Phoenix Firestop provides code compliant installations of penetration and joint firestop systems.” Recorded description excerpt · October 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 73 company matches
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Passive firestop system suppliers: dataset insights
October 28, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
73 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 73 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 28, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for passive firestop system suppliers?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many passive firestop system suppliers did RevenueBase find based in the United States?
The saved snapshot records 73 matching company records, 952 tracked contacts and 326 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 28, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Passive firestop system suppliers by geography
Cite this list
RevenueBase Data Team. Top 25 passive firestop system suppliers based in the United States. Snapshot: October 28, 2026. https://revenuebase.ai/companies/passive-firestop-system-suppliers/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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