DYNA® OPTIMATRIX Polymeric Jointing Sand is a dry mixture of calibrated sands, polymers, binders and dedicated chemical controlling agents specifically designed to bind firmly and easily together in horizontal pavement joints. Applied dry into the pavement joints, it will harden and stay in place after activation. It sets in minutes after being activated with water, which ensures a proper installation even when the weather calls for early rain. Carefully blended with dedicated control agents, the quality of DYNA® OPTIMATRIX Polymeric Jointing Sand ensures increased stability, performance and lasting durability to your paver projects.