This report presents the findings from a 1-yr Bureau of Mines program in which sulfur concrete reinforcing materials were tested and evaluated to determine their resistance to corrosion. It also summarizes the permeation characteristics of sulfur concrete and the exemplary performance of precast, reinforced sulfur concrete structures in various industrial environments. The Bureau is furthering the development of sulfur concrete technology as part of a larger effort to find uses for the nation's plentiful sulfur resources in construction materials. Sulfur concrete is a corrosion- resistant material that can be used in acid and salt environments where conventional materials fail. Penetration of corrosion- inducing agents is minimized because of the low permeation characteristics of sulfur concrete.