CLAY MINE ADOBE. This company manufactures bio-based, sustainably sourced adobe block using a Portland cement stabilizer and traditional admixtures that include wheat straw and coarse aggregates. To prevent block erosion, clay plaster stucco up to 4 inches thick is typically applied, but the low-maintenance block requires no sealing and retains the authentic look of unstabilized adobe. Block is available in standard as well as custom sizes and natural custom colors. Cement-stabilized and unstabilized clay plaster in a variety of earth tones is also available. The Tucson-based company ships the materials throughout the Southwest. 520.578.2222.