Spread Polymeric Sand
With the pavers compacted, the next step is to spread polymeric sand into the labyrinth's joints (Image 1). When activated with water, the sand turns into a concrete-like substance that prevents weeds and discourages ants, but still remains semi-permeable to water. Be sure to wear a face mask and eye protection while handling the polymeric sand. Spread the sand around until the joints are completely filled in.
Then come back in with the compactor. Again, start from the outside and work towards the center. This will help sand settle in the joints, so if you find the joints getting a little low, go back through and sweep in extra sand (Image 2). Next, bring in a hose and mist the labyrinth. That will activate the polymeric sand. Go over the labyrinth two or three times, but be careful not to over-wet it. Just mist the surface.
Wait for the polymeric sand to activate, which will take about 24 hours, and then spray the labyrinth down one final time (Image 3). Finally, fill in some loam around the outside edges of the labyrinth to cover up where you dug. With that, your perfect meditational labyrinth is complete.