The objective of this research was to evaluate the effectiveness of brushed-on cementitious coatings in obstructing the egression of radon gas in residential new concrete contruction. Laboratory tests characterized the radiological properties of concrete samples before and after being treated with coatings and sealants. The water to cement ratios of the concrete samples were varied to change their radiological transport properties resulting in two concrete batches, a more porous batch, Batch A, and a less porous batch, Batch B. In addition, the cementitious coatings were tested for their radiological transport properties as cast samples. Original testing systems were designed to measure the permeablity (advective radon flux) and diffusion coefficient (diffusive radon flux) of each experimental sample (before and after application of cementitious coating).
| Sealant Description | Sealant Type | Manufacturer | Distributer |
| Epoxy - 2 part | Epoxy | Lord Corp. | Ellsworth Adhesives |
| Aluminum filled epoxy - 2 part | Epoxy | Devcon Corp. | Ellsworth Adhesives |
| High solids epoxy - 2 part | Epoxy | Dynamis Inc. | McMaster - Carr |
| Polysulfide - 2 part | Polysulfide | Morton International | Morton International |
| Sealer 1500 | Chemically Reactive Silicates | Moxie International | Moxie International |
| Flooring Sealer II | Chemically Reactive Silicates | Moxie International | Moxie International |
| Versaflex 9 | Latex | Hampshire Chemical | Hampshire Chemical |
| Versaflex 1 | Latex | Hampshire Chemical | Hampshire Chemical |
| Daratek XB 3631 | Latex | Hampshire Chemical | Hampshire Chemical |
| Daran SL 143 | Latex | Hampshire Chemical | Hampshire Chemical |
| Damtite - waterproofing powder | Ceramic powder | Thomas Waterproof Coatings Co. | McMaster - Carr |
| Flexane - 2 part polyurethane | Urethane Rubber | Devcon Corp. | Ellsworth Adhesives |