Abstract: Saltwater, waste water, atmospheric and other corrosion resistant barrier apparatus and radioactive contamination containment barrier apparatus that are applied to a substrate, such as to metal, steel, concrete, rock, stone, ceramic material, tile, and the like, and methods for manufacturing the same. The apparatus generally having an asphaltic mastic basecoat and a thermoplastic topcoat which is at least partially melted and integrated into the mastic basecoat. Alternatively, the apparatus further having a solvent primer which is applied to the substrate prior to the application of the mastic basecoat.