Price exclusive of tax. Country of Origin: INDIA The admixture gives your plaster workability, durability, good. Both the richer and leaner cement-sand mortar mixes have their own merits and demerits. Rich mortar mix has a better bonding effect but it is associated with severe shrinkage cracks upon drying. Leaner mixes with less cement content exhibit less shrinkage and fewer shrinkage cracks in the plaster but they show a poor quality of adhesion to brick work or RCC which results in hollowness.