IQ BLOCK JOINT MORTAR is a ready-to-mix, self-curing cementitious mortar for mounting and bonding AAC, CLC, hollow concrete blocks, and brick. It is a factory-prepared blend of carefully selected raw materials, Portland cement, graded aggregates and polymers. IQ BLOCK JOINT MORTAR is in compliance with C 1660-09 ASTM standard which is worlds only standard for thin bed mortar for autoclaved aerated concrete masonry.