Paver block hardener is a construction chemical used to make precast concrete products harden faster and become denser. They are composed of inorganic compounds and are available in both liquid and powder form. The hardener for paver blocks, when mixed with concrete, reacts with the free lime in the concrete and creates a mixture of silicate compounds. They are highly useful to make concrete paver blocks more robust with enhanced durability. Using block hardeners makes the concrete blocks up to 300 times stronger than conventional concrete blocks and bricks. The concrete paver hardener also makes the blocks waterproof, which prevents them from getting damaged by rain and dampness. This, in turn, also prolongs the life of paved surfaces and lowers the maintenance effort and costs too.