Build the perfect stone wall Words: Jeff FarmakesSPEC MIX® Building Stone Mortars are especially designed for stone masons building masonry walls with full depth stone units. Whether the specification calls for soft or hard stone, Building Stone Mortar mixes are engineered to match the specific properties of each stone to increase the mortar-to-stone bond strength while increasing the number of units your masons install every day. Building Stone Mortar is available in standard gray and custom colored formulations that are completely preblended for optimal consistency, durability and increased jobsite efficiency–EVERY TIME! Visit www.specmix.com to learn more.