Oklahoma City

25 YearsGeneral Manager: Nathan Koehn
1632 Linwood Blvd.
Oklahoma City, OK 73106
PHONE 405.948.4440
FAX 405.947.1118

The Oklahoma Waterproofing Company is a specialty construction firm providing waterproofing, caulking and moisture protection and restoration services to general contractors and building owners. With a highly trained, service and safety conscious staff, our objective is to perform our contracted work in a manner that far exceeds our customer’s expectations. We are confident that our future success is determined by our performance today.

The Company

Oklahoma Waterproofing Company was incorporated in 1996 and is a contractor certified and authorized by the state of Oklahoma. Oklahoma Waterproofing Company is also licensed to do business in Arkansas – license #0188860408. We organized our resources in response to those seeking specialty companies that are willing to build a team that they can depend on. Oklahoma Waterproofing Company has more than a decade of experience in the specialty construction industry. With a track record of project and operations experience that has been successful throughout the United States. Our staff’s performance includes hundreds of projects, thousands of different types of installations and nearly twenty million dollars of completed work.

Oklahoma Waterproofing has initiated one of the most progressive safety programs, which also includes hazardous material training and hazardous waste management as well as extensive personal protective equipment training. We believe that a high level of environmental awareness will not only protect our employees and their families but our vendors and customers as well. Oklahoma Waterproofing supplements its training with the use of outside professional training organizations, weekly company-wide safety meetings, and daily quality control inspections.

Services and Capabilities

Caulking and Sealants

Oklahoma Waterproofing Company has significant knowledge and experience in the design, function, application, installation and performance of joint sealants and caulks. Some of the materials installed by our company include:

  • Silicones
  • Urethanes
  • Latex
  • Polysulfides
  • Acrylics
  • Asphalt Modified Urethanes
  • Epoxies
  • Coal-Tar Modified Urethanes
  • Intumescent Materials
  • Neoprenes/EPDM/Butyl Rubber
  • Pre-compressed foam
  • Expansion Joint Assemblies

Quality manufacturers endorse the sealant installation methods that we employ. These companies include:

  • BASF / Sonneborn
  • Pecora
  • Watson Bowman
  • Emseal
  • Tremco
  • Dow Corning
  • Vulkem/Mameco
  • M & M Systems


Oklahoma Waterproofing’s President, Dan Cain, is an active member of SWRI, the Sealant, Waterproofing and Restoration Institute and is on the Board of Directors and chairs the Validation Committee.


Oklahoma Waterproofing has completed several restoration projects including:
  • Masonry restoration
  • Complete restoration of several parking garages
  • Removal and replacements of caulks, sealants and glazing in several historic office buildings
  • Mitigation of leaking windows, roofs, basements, hotel balconies, planters, upper floor swimming pools/spas, and underground parking garages.
  • Oklahoma Waterproofing’s extensive experience has allowed restoration projects to be accomplished in the most economically efficient manner with minimal disruption of existing operations.


As a leading cause of construction litigation, waterproofing systems require proper installation by qualified people. The Oklahoma Waterproofing Company is proficient in the installation of most major brands of sheet, fluid and bentonite waterproofing systems. These systems include those manufactured by:

  • Polyguard
  • W. R. Grace
  • Mirafi
  • Tremco
  • W. R. Meadows
  • American Colloid
  • Paramount
  • IMC/Fibermat
  • BASF / Sonneborn
  • Euclid

Moisture Protection Systems

Our staff successfully installs many supplemental moisture protection systems including dampproofing, water repellent coatings, vapor barriers, insulation and in-plane wall drainage composites (drainage mats). The Oklahoma Waterproofing Company is experienced with the complete moisture protection package.

Specialty Services

Some projects have uncommon or unique requirements. Some of the specialty services the George D. Alan Company provides include:

  • Concrete Repair and patching
  • Floor Sealers/Coatings
  • Firestopping
  • Exterior Building Cleaning
  • Specialty Concrete Coatings
  • Specialty Stain Removal
  • Containment Coatings
  • Concrete Staining/Tinting



It is great to work with a company that approaches every aspect of a project with the level of professionalism and pride that GDA does. Their involvement in industry organizations and their training programs demonstrate their commitment to excellence.

Rick Johnson, South Central Regional Manager, BASF

W. R. Grace

It is rare to find an applicator that cares as much as GDA and their group of companies.  They have taken waterproofing to the next level.

Jill Heidorf, Architectural Sales Rep, W. R. Grace

United States Cold Storage

The George D Alan Company has done an excellent job...I would definitely recommend this company to anyone with floor issues.

Chad Saltzman, Chief Engineer, United States Cold Storage, Inc.

Silicone Specialties

Every aspect of working with employees from GDA is a step above their competition.

Duane Barnett, President/ CEO, Silicone Specialties