Birla Aerocon 40 Kg Block Jointing Mortar is a superior water resistant cement based mortar joint especially formulated for joining Birla Aerocon AAC Blocks etc. It contains selected graded dry sand, grey cement and imported & modified polymers that make the joints stronger and smoother. Its Superbond Technology further improves workability, water retention, durability and strong adhesions to surfaces. It is also more resistant to corrosive environment than traditional jointing mortars.