We provide a full line of services to meet your waterproofing needs.
Our companies have significant knowledge and experience in the design, function, application, installation and performance of waterproofing, caulking, and moisture protection.

Caulking & Sealants

Sealants are the most widely used waterproofing materials. Sealants are applied from below grade to roof areas and act as a direct waterproofing barrier. Sealants are also used to prevent air infiltration into and out of buildings. The majority of a building envelope requires some form of sealant for weather tightness and to allow for structural or thermal movement and to maintain the building envelope effectiveness. Some of the various types of sealants installed by our companies include:

  • Silicone
  • Urethanes
  • Latex
  • Polysulfide
  • Epoxies
  • Neoprenes/EPDM/Butyl Rubber
  • Pre-compressed foams
  • Expansion Joint Assemblies



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