Polymer Modified Veneer Stone Mortar 80 lb. by QUIKRETE #113785#113785 Veneer Stone Mortar Polymer Modified Pre blended, polymer modified sanded product that is designed for veneer applications and tuck pointing of manufactured and thin natural stone where increased bond is needed. Construction grade. Useful with manufactured stone, faux stone, thin brick, and thin natural stone veneers as a bond coat, scratch and brown coat, and as mortar joint grout over concrete and masonry surfaces or galvanized, expanded