Company lists · Data refreshed September 2026

Top 25 Tunnel waterproofing contractors based in the United States

Name: Tunnel waterproofing contractors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 219 companies tracked

RevenueBase identified 219 tunnel waterproofing contractors headquartered in the United States as of September 2026 and tracks 2,631 professional contacts across them, including 1,160 with verified work emails. Dallas is the largest hub.

This list covers tunnel waterproofing contractors headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 2026.

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

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 29, 2026 86% judged on-target in blind review

219Companies

2,631Contacts tracked

1,160Verified emails

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The 25 largest tunnel waterproofing contractors based in the United States

Ranked by team size

Top 25 of 219 tunnel waterproofing contractors based in the United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to tunnel waterproofing contractors: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	SAK Construction, LLC	Strong evidence	O Fallon, MO, United StatesHQ checked Sep 29, 2026	501-1,000	326 contacts →
	Strong evidence “SAK Construction is one of the largest privately held pipeline rehabilitation and tunneling contractors in the U.S.” Source: RevenueBase Database · checked Sep 29, 2026
2	Delve Underground	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	201-500	311 contacts →
	Indirect evidence “Delve Underground is a leader in heavy civil engineering, serving the transportation, water, wastewater, and energy industries.” Source: RevenueBase Database · checked Sep 29, 2026
3	RAM Construction Services	Strong evidence	Livonia, MI, United StatesHQ checked Sep 29, 2026	501-1,000	288 contacts →
	Strong evidence “Founded in 1918, RAM Construction Services is the oldest and most experienced waterproofing and restoration contractor in the United States.” Source: RevenueBase Database · checked Sep 29, 2026
4	Beacon Waterproofing Products	Partial evidence	Jacksonville, FL, United StatesHQ checked Sep 29, 2026	51-200	133 contacts →
	Partial evidence “At Beacon Waterproofing, we’re the largest, nationwide distributor of commercial sealants and specialty waterproofing solutions.” Source: RevenueBase Database · checked Sep 29, 2026
5	JW Fowler	Indirect evidence	Dallas, OR, United StatesHQ checked Sep 29, 2026	201-500	81 contacts →
	Indirect evidence “J.W.” Source: RevenueBase Database · checked Sep 29, 2026
6	JAY DEE Contractors INC	Partial evidence	Livonia, MI, United StatesHQ checked Sep 29, 2026	201-500	77 contacts →
	Partial evidence “Jay Dee Contractors (Jay Dee) is a family-owned company and a leader in heavy underground construction serving clients across the United States and Canada since 1965.” Source: RevenueBase Database · checked Sep 29, 2026
7	Kenseal Construction Products	Partial evidence	Baltimore, MD, United StatesHQ checked Sep 29, 2026	51-200	66 contacts →
	Partial evidence “Kenseal Construction Products distributes quality innovative product lines to the waterproofing, sealant, glazing and concrete/masonry restoration markets.” Source: RevenueBase Database · checked Sep 29, 2026
8	Ric-Man Construction, INC	Indirect evidence	Sterling Heights, MI, United StatesHQ checked Sep 29, 2026	51-200	55 contacts →
	Indirect evidence “With over 60 years of pioneering excellence in underground construction, Ric-Man has established itself as a leader in the industry, renowned for our innovative approaches and…” Source: RevenueBase Database · checked Sep 29, 2026
9	LJB Underground Services Aldea Services INC	Indirect evidence	Frederick, MD, United StatesHQ checked Sep 29, 2026	201-500	53 contacts →
	Indirect evidence “LJB Underground Services (Aldea) provides expert technical resources for design and construction management, of heavy civil underground projects and risk management of all major…” Source: RevenueBase Database · checked Sep 29, 2026
10	Gall Zeidler Consultants	Partial evidence	Ashburn, VA, United StatesHQ checked Sep 29, 2026	51-200	50 contacts →
	Partial evidence “This year marks 25 years of engineering excellence at Gall Zeidler Consultants (GZ)-a global leader in tunnel design, engineering, geotechnics, tunnel rehabilitation, and program…” Source: RevenueBase Database · checked Sep 29, 2026
11	Bradshaw Construction Corporation	Strong evidence	Eldersburg, MD, United StatesHQ checked Sep 29, 2026	51-200	45 contacts →
	Strong evidence “Bradshaw Construction Corporation is a leading contractor in the tunneling industry.” Source: RevenueBase Database · checked Sep 29, 2026
12	Kilduff Underground Engineering, INC	Partial evidence	Denver, CO, United StatesHQ checked Sep 29, 2026	51-200	40 contacts →
	Partial evidence “Kilduff Underground Engineering (KUE) was established in 2014 by Todd Kilduff, PE, to support contractors, A/E firms and owners.” Source: RevenueBase Database · checked Sep 29, 2026
13	MTN INC	Indirect evidence	Highlands Ranch, CO, United StatesHQ checked Sep 29, 2026	51-200	38 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
14	Strickland Waterproofing	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 29, 2026	51-200	36 contacts →
	Partial evidence “Strickland Waterproofing Company Inc.” Source: RevenueBase Database · checked Sep 29, 2026
15	Savy & Sons	Strong evidence	Amston, United StatesHQ checked Sep 29, 2026	11-50	33 contacts →
	Strong evidence “Savy & Sons is a full-service contractor specializing in Waterproofing Solutions, Water & Wastewater Rehabilitation, Coatings & Linings, Infrastructure Restoration, No Dig Pipe…” Source: RevenueBase Database · checked Sep 29, 2026
16	Summit Sealants	Indirect evidence	Montrose, CO, United StatesHQ checked Sep 29, 2026	201-500	24 contacts →
	Indirect evidence “Summit Sealants is a construction company based out of 13658 Carefree Dr, Montrose, Colorado, United States.” Source: RevenueBase Database · checked Sep 29, 2026
17	Consolidated Waterproofing Contractors, INC	Strong evidence	Beltsville, MD, United StatesHQ checked Sep 29, 2026	201-500	23 contacts →
	Strong evidence “For more than 30 years, Consolidated Waterproofing Contractors has been a trusted name in waterproofing and repair.” Source: RevenueBase Database · checked Sep 29, 2026
18	Alchemco	Partial evidence	Henrico, VA, United StatesHQ checked Sep 29, 2026	51-200	21 contacts →
	Partial evidence “Alchemco, a pioneering leader in construction technology, has established itself as a global authority in the concrete waterproofing industry; with a variety of projects being…” Source: RevenueBase Database · checked Sep 29, 2026
19	Sure Seal LLC	Partial evidence	Hondo, United StatesHQ checked Sep 29, 2026	1-10	17 contacts →
	Partial evidence “Sure Seal, established in 1995, offers commercial grade waterproofing applications: bulk caulking, above and below grade waterproofing, flashing, damp-proofing, traffic coatings…” Source: RevenueBase Database · checked Sep 29, 2026
20	FPT Infrastructure	Indirect evidence	Mount Airy, NC, United StatesHQ checked Sep 29, 2026	51-200	15 contacts →
	Indirect evidence “FPT Infrastructure manufactures and markets a portfolio of integrated solutions engineered to expertly restore existing structures and maximize the life of new construction.” Source: RevenueBase Database · checked Sep 29, 2026
21	General Caulking And Coatings Company, INC	Partial evidence	Miami, FL, United StatesHQ checked Sep 29, 2026	51-200	15 contacts →
	Partial evidence “Professional Waterproofing Services for building structures in both new construction and restoration markets for 60 years.” Source: RevenueBase Database · checked Sep 29, 2026
22	LJS Waterproofing LLC	Partial evidence	Wyckoff, NJ, United StatesHQ checked Sep 29, 2026	11-50	15 contacts →
	Partial evidence “LJS Waterproofing LLC - Seawall Repair, Chemical Grout Injection, Leak Seal, Soil Stabilization, Slab Lifting, Void Fill, Concrete Repair and Restoration…” Source: RevenueBase Database · checked Sep 29, 2026
23	Boring & Tunneling Co. America, INC	Indirect evidence	Houston, United StatesHQ checked Sep 29, 2026	51-200	15 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
24	Kazemi Waterproofing	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	51-200	14 contacts →
	Partial evidence “We are a recognized Industry Leader in the Southern California Waterproofing Construction scene.” Source: RevenueBase Database · checked Sep 29, 2026
25	Affholder, LLC	Partial evidence	O'fallon, MO, United StatesHQ checked Sep 29, 2026	51-200	13 contacts →
	Partial evidence “AFFHOLDER is a leader in large-diameter tunneling, shaft excavation, shotcrete, and sliplining services.” Source: RevenueBase Database · checked Sep 29, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: tunnel waterproofing contractors. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names tunnel waterproofing contractors.
Partial evidence: Its own public description names part of tunnel waterproofing contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name tunnel waterproofing contractors. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 219 tunnel waterproofing contractors based in the United States

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Tunnel waterproofing contractors based in the United States at a glance

As of Sep 29, 2026

44.1%Verified-email coverage

12.0Average contacts per company

11-50Median size (employees)

3.7%Largest-city concentration · Dallas

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 219 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among tunnel waterproofing contractors, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “tunnel waterproofing contractors”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names tunnel waterproofing contractors), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among tunnel waterproofing contractors, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 1,160 across the full list. 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 September 29, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names tunnel waterproofing contractors, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many tunnel waterproofing contractors are there based in the United States?

RevenueBase identified 219 tunnel waterproofing contractors headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

SAK Construction, LLC, headquartered in O Fallon, tops this list with the largest team on record.

Which city has the most tunnel waterproofing contractors?

Dallas leads with 8 headquartered companies, followed by Houston (5) and San Diego (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,160 verified decision-maker contacts tracked across these 219 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, 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.