Company lists · Data refreshed October 2026
Top 25 Fireblocking suppliers based in the United States
RevenueBase identified 238 company matches for fireblocking suppliers associated with the United States as of October 2026 and tracks 2,719 professional contacts across them, including 989 with verified work emails. Houston is the largest hub.
This list covers company matches for fireblocking 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 25, 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 fireblocking suppliers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 342 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 2 | 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 25, 2026 · View company records in RevenueBase | |||||
| 3 | 187 contacts → | ||||
Exact match “Interior Supply Inc.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 4 | 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 25, 2026 · View company records in RevenueBase | |||||
| 5 | 134 contacts → | ||||
Exact match “LSS Life Safety Services® (LSS) is a nationwide leader of fire and smoke damper inspections and repairs, fire door inspection, repair, and re-labeling, as well as firestopping and…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 6 | 71 contacts → | ||||
Exact match “Smoke Guard, Inc.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 7 | 66 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 8 | 59 contacts → | ||||
Exact match “Silicone Specialties Inc.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 9 | 50 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 · Oct 25, 2026 · View company records in RevenueBase | |||||
| 10 | 46 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 11 | 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 25, 2026 · View company records in RevenueBase | |||||
| 12 | 36 contacts → | ||||
Exact match “Tailored Foam, Inc.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 13 | 27 contacts → | ||||
Exact match “Founded in 1946, McKEON is a full line manufacturer of fire doors, fire shutters, fire curtains, smoke curtains, service doors and security grilles.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 14 | 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 25, 2026 · View company records in RevenueBase | |||||
| 15 | 25 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 16 | 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 25, 2026 · View company records in RevenueBase | |||||
| 17 | 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 25, 2026 · View company records in RevenueBase | |||||
| 18 | 21 contacts → | ||||
Exact match “Fire-Seal is a full service barrier management contractor specializing in the assessment and installation of barrier containment systems for Healthcare, Education, Industrial and…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 19 | 20 contacts → | ||||
Exact match “In 2005, Mill Brook Fire Protection was founded as a family owned and operated fire suppression company.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 20 | 20 contacts → | ||||
Exact match “Kirby-Cundiff Insulation specializes in the insulation of pipes, duct-work, and equipment for industrial and commercial needs.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 21 | 19 contacts → | ||||
Exact match “HY-C has been protecting homes and families since 1947 with home improvement products including chimney covers, UL1618 certified stove boards, firewood storage log racks, nuisance…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 22 | 19 contacts → | ||||
Exact match “Bartkowski Life Safety is a full-service Life Safety Specialty Contractor.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 23 | 19 contacts → | ||||
Exact match “All American Insulation is a committed company specializing in residential, commercial, and industrial insulation, additionally, we do fire stopping.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 24 | 18 contacts → | ||||
Exact match “We are the leader in quality installation of all types of residential and commercial Insulation types from Fiberglass batt and blown to cellulose blown and even open and closed…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 25 | 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 25, 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 “fireblocking 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 238 fireblocking suppliers based in the United States
See the full list, filter by size, metro and specialty, and access 989 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Fireblocking suppliers based in the United States at a glance
As of Oct 25, 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 238 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 “fireblocking 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 989 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 25, 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 “fireblocking suppliers”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many fireblocking suppliers are there based in the United States?
RevenueBase identified 238 company matches for fireblocking 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?
General Insulation Company, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most fireblocking suppliers?
Houston leads with 5 company records, followed by Columbus (4) and Green Bay (4).
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 989 professional contacts with verified work emails tracked across these 238 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 25, 2026.
Ready to reach these companies? Verified emails and direct dials for all 238 fireblocking suppliers based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Fireblocking suppliers by geography
- Fireblocking suppliers based in London, United Kingdom
- Fireblocking suppliers based in Australia
- Fireblocking suppliers based in Canada
- Fireblocking suppliers based in France
- Fireblocking suppliers based in Germany
- Fireblocking suppliers based in the Netherlands
- Fireblocking suppliers based in the United Arab Emirates
- Fireblocking suppliers based in the United Kingdom
Browse the directory
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Fireblocking suppliers based in London, United Kingdom
- Fireblocking suppliers based in Australia
- Fireblocking suppliers based in Canada
- Fireblocking suppliers based in France
- Fireblocking suppliers based in Germany
- Fireblocking suppliers based in the Netherlands
Company intelligence · public preview
Top 25 fireblocking 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 238 matching company records for fireblocking suppliers based in the United States, with 2,719 tracked contacts and 989 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 25, 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 fireblocking 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 | General Insulation Company, INCgeneralinsulation.com HQ: Medford, MA, United StatesReported employees: 501-1,000 | Medford, MA, United States | 501-1,000 | Exact match | 342 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 2 | 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 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Interior Supply, INCinteriorsupplyinc.com HQ: Columbus, OH, United StatesReported employees: 201-500 | Columbus, OH, United States | 201-500 | Exact match | 187 contacts → |
“Interior Supply Inc.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | 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 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  LSS Life Safety Serviceslifesafetyservices.comHQ: Louisville, KY, United StatesReported employees: 201-500 | Louisville, KY, United States | 201-500 | Exact match | 134 contacts → |
“LSS Life Safety Services® (LSS) is a nationwide leader of fire and smoke damper inspections and repairs, fire door inspection, repair, and re-labeling, as well as firestopping and…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Smoke Guardsmokeguard.com HQ: Boise, ID, United StatesReported employees: 51-200 | Boise, ID, United States | 51-200 | Exact match | 71 contacts → |
“Smoke Guard, Inc.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | 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. | |||||
| 8 | Silicone Specialties, Inc. SSIssicm.com HQ: Dallas, TX, United StatesReported employees: 51-200 | Dallas, TX, United States | 51-200 | Exact match | 59 contacts → |
“Silicone Specialties Inc.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | The Nelson Companiesnelsoninsulation.com HQ: Lake Zurich, IL, United StatesReported employees: 51-200 | Lake Zurich, IL, United States | 51-200 | Exact match | 50 contacts → |
“Founded in 1958, The Nelson Companies is a family of independently operated specialty contracting businesses serving commercial, industrial, healthcare, education, manufacturing…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | NOPE31w.com HQ: Columbus, OH, United StatesReported employees: Not recorded | Columbus, OH, United States | Not recorded | Exact match | 46 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 11 | 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 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Tailored Foamtailoredfoam.com HQ: Hickory, NC, United StatesReported employees: 11-50 | Hickory, NC, United States | 11-50 | Exact match | 36 contacts → |
“Tailored Foam, Inc.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Mckeonmckeondoor.com HQ: Bellport, NY, United StatesReported employees: 51-200 | Bellport, NY, United States | 51-200 | Exact match | 27 contacts → |
“Founded in 1946, McKEON is a full line manufacturer of fire doors, fire shutters, fire curtains, smoke curtains, service doors and security grilles.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | BNZ Materialsbnzmaterials.com HQ: Zelienople, PA, United StatesReported employees: 51-200 | Zelienople, PA, United States | 51-200 | Exact match | 27 contacts → |
“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 description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Momper Insulationmomper.com HQ: Fort Wayne, IN, United StatesReported employees: 11-50 | Fort Wayne, IN, United States | 11-50 | Exact match | 25 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 16 |  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 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | 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 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Fire-Seal, LLCfireseal-llc.com HQ: Columbus, OH, United StatesReported employees: 11-50 | Columbus, OH, United States | 11-50 | Exact match | 21 contacts → |
“Fire-Seal is a full service barrier management contractor specializing in the assessment and installation of barrier containment systems for Healthcare, Education, Industrial and…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Mill Brook Fire Protectionmillbrookfireprotection.com HQ: Hauppauge, NY, United StatesReported employees: 11-50 | Hauppauge, NY, United States | 11-50 | Exact match | 20 contacts → |
“In 2005, Mill Brook Fire Protection was founded as a family owned and operated fire suppression company.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | HQ: Roanoke, VA, United StatesReported employees: 51-200 | Roanoke, VA, United States | 51-200 | Exact match | 20 contacts → |
“Kirby-Cundiff Insulation specializes in the insulation of pipes, duct-work, and equipment for industrial and commercial needs.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Hy-Chy-c.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 19 contacts → |
“HY-C has been protecting homes and families since 1947 with home improvement products including chimney covers, UL1618 certified stove boards, firewood storage log racks, nuisance…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Bartkowskibartlsc.com HQ: South Holland, IL, United StatesReported employees: 11-50 | South Holland, IL, United States | 11-50 | Exact match | 19 contacts → |
“Bartkowski Life Safety is a full-service Life Safety Specialty Contractor.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  ALL American Insulation, Corpaainsulation.netHQ: Miami, FL, United StatesReported employees: 51-200 | Miami, FL, United States | 51-200 | Exact match | 19 contacts → |
“All American Insulation is a committed company specializing in residential, commercial, and industrial insulation, additionally, we do fire stopping.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  ABS Southeastabssoutheast.netHQ: New Bern, NC, United StatesReported employees: 201-500 | New Bern, NC, United States | 201-500 | Exact match | 18 contacts → |
“We are the leader in quality installation of all types of residential and commercial Insulation types from Fiberglass batt and blown to cellulose blown and even open and closed…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | 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 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 238 company matches
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Fireblocking suppliers: dataset insights
October 25, 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
238 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 238 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 25, 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 fireblocking 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 fireblocking suppliers did RevenueBase find based in the United States?
The saved snapshot records 238 matching company records, 2,719 tracked contacts and 989 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 25, 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
Fireblocking suppliers by geography
- Fireblocking suppliers based in London, United Kingdom
- Fireblocking suppliers based in Australia
- Fireblocking suppliers based in Canada
- Fireblocking suppliers based in France
- Fireblocking suppliers based in Germany
- Fireblocking suppliers based in the Netherlands
- Fireblocking suppliers based in the United Arab Emirates
- Fireblocking suppliers based in the United Kingdom
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 fireblocking suppliers based in the United States. Snapshot: October 25, 2026. https://revenuebase.ai/companies/fireblocking-suppliers/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Fireblocking suppliers based in London, United Kingdom
- Fireblocking suppliers based in Australia
- Fireblocking suppliers based in Canada
- Fireblocking suppliers based in France
- Fireblocking suppliers based in Germany
- Fireblocking suppliers based in the Netherlands
Company intelligence · public preview
Top 25 fireblocking suppliers based in the United States
RevenueBase records 238 matching company records for fireblocking suppliers based in the United States, with 2,719 tracked contacts and 989 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 25, 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 fireblocking 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 | General Insulation Company, INCgeneralinsulation.com HQ: Medford, MA, United StatesReported employees: 501-1,000 | Medford, MA, United States | 501-1,000 | Exact match | 342 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 2 | 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 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Interior Supply, INCinteriorsupplyinc.com HQ: Columbus, OH, United StatesReported employees: 201-500 | Columbus, OH, United States | 201-500 | Exact match | 187 contacts → |
“Interior Supply Inc.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | 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 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | LSS Life Safety Serviceslifesafetyservices.com HQ: Louisville, KY, United StatesReported employees: 201-500 | Louisville, KY, United States | 201-500 | Exact match | 134 contacts → |
“LSS Life Safety Services® (LSS) is a nationwide leader of fire and smoke damper inspections and repairs, fire door inspection, repair, and re-labeling, as well as firestopping and…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Smoke Guardsmokeguard.com HQ: Boise, ID, United StatesReported employees: 51-200 | Boise, ID, United States | 51-200 | Exact match | 71 contacts → |
“Smoke Guard, Inc.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | 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. | |||||
| 8 | Silicone Specialties, Inc. SSIssicm.com HQ: Dallas, TX, United StatesReported employees: 51-200 | Dallas, TX, United States | 51-200 | Exact match | 59 contacts → |
“Silicone Specialties Inc.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | The Nelson Companiesnelsoninsulation.com HQ: Lake Zurich, IL, United StatesReported employees: 51-200 | Lake Zurich, IL, United States | 51-200 | Exact match | 50 contacts → |
“Founded in 1958, The Nelson Companies is a family of independently operated specialty contracting businesses serving commercial, industrial, healthcare, education, manufacturing…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | NOPE31w.com HQ: Columbus, OH, United StatesReported employees: Not recorded | Columbus, OH, United States | Not recorded | Exact match | 46 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 11 | 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 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Tailored Foamtailoredfoam.com HQ: Hickory, NC, United StatesReported employees: 11-50 | Hickory, NC, United States | 11-50 | Exact match | 36 contacts → |
“Tailored Foam, Inc.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Mckeonmckeondoor.com HQ: Bellport, NY, United StatesReported employees: 51-200 | Bellport, NY, United States | 51-200 | Exact match | 27 contacts → |
“Founded in 1946, McKEON is a full line manufacturer of fire doors, fire shutters, fire curtains, smoke curtains, service doors and security grilles.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | BNZ Materialsbnzmaterials.com HQ: Zelienople, PA, United StatesReported employees: 51-200 | Zelienople, PA, United States | 51-200 | Exact match | 27 contacts → |
“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 description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Momper Insulationmomper.com HQ: Fort Wayne, IN, United StatesReported employees: 11-50 | Fort Wayne, IN, United States | 11-50 | Exact match | 25 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 16 | 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 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | 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 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Fire-Seal, LLCfireseal-llc.com HQ: Columbus, OH, United StatesReported employees: 11-50 | Columbus, OH, United States | 11-50 | Exact match | 21 contacts → |
“Fire-Seal is a full service barrier management contractor specializing in the assessment and installation of barrier containment systems for Healthcare, Education, Industrial and…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Mill Brook Fire Protectionmillbrookfireprotection.com HQ: Hauppauge, NY, United StatesReported employees: 11-50 | Hauppauge, NY, United States | 11-50 | Exact match | 20 contacts → |
“In 2005, Mill Brook Fire Protection was founded as a family owned and operated fire suppression company.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | HQ: Roanoke, VA, United StatesReported employees: 51-200 | Roanoke, VA, United States | 51-200 | Exact match | 20 contacts → |
“Kirby-Cundiff Insulation specializes in the insulation of pipes, duct-work, and equipment for industrial and commercial needs.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Hy-Chy-c.com HQ: St. Louis, MO, United StatesReported employees: 51-200 | St. Louis, MO, United States | 51-200 | Exact match | 19 contacts → |
“HY-C has been protecting homes and families since 1947 with home improvement products including chimney covers, UL1618 certified stove boards, firewood storage log racks, nuisance…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Bartkowskibartlsc.com HQ: South Holland, IL, United StatesReported employees: 11-50 | South Holland, IL, United States | 11-50 | Exact match | 19 contacts → |
“Bartkowski Life Safety is a full-service Life Safety Specialty Contractor.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | ALL American Insulation, Corpaainsulation.net HQ: Miami, FL, United StatesReported employees: 51-200 | Miami, FL, United States | 51-200 | Exact match | 19 contacts → |
“All American Insulation is a committed company specializing in residential, commercial, and industrial insulation, additionally, we do fire stopping.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | ABS Southeastabssoutheast.net HQ: New Bern, NC, United StatesReported employees: 201-500 | New Bern, NC, United States | 201-500 | Exact match | 18 contacts → |
“We are the leader in quality installation of all types of residential and commercial Insulation types from Fiberglass batt and blown to cellulose blown and even open and closed…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | 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 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 238 company matches
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Fireblocking suppliers: dataset insights
October 25, 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
238 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 238 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 25, 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 fireblocking 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 fireblocking suppliers did RevenueBase find based in the United States?
The saved snapshot records 238 matching company records, 2,719 tracked contacts and 989 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 25, 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
Fireblocking suppliers by geography
- Fireblocking suppliers based in London, United Kingdom
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- Fireblocking suppliers based in Germany
- Fireblocking suppliers based in the Netherlands
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Browse the directory
Cite this list
RevenueBase Data Team. Top 25 fireblocking suppliers based in the United States. Snapshot: October 25, 2026. https://revenuebase.ai/companies/fireblocking-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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