they're not impervious to damage. Layers of mortar hold the cinder blocks in place, just as it would in brick walls, and seal off gaps between blocks to prevent water from getting into the wall.
Then, apply the caulk to the crack liberally, covering the joint completely.[6] For a smooth finish, run a razor over the applied caulk to flatten the joint and make it blend with the rest of the block. You can also use this method to seal cracks between individual cinder blocks and...