Bonding concrete blocks at the stage of laying stabilizes them during pouring concrete. In addition it fills the gaps between blocks and between the peaks which results in the protection of these sites prior to absorption of moisture into the concrete core.
The adhesive for bonding and sealing concrete blocks, stone and precast. Heavily one-component adhesive polyurethane glue / sealant. It has good adhesion to concrete, brick, metal and many other substrates. It hardens under the influence of moisture from the air forming hard but flexible rubber.