Do the Playsafe Designer play ground rubber tiles require glue to hold together in a outdoor play ground? If what kind and do you carry the glue?

Our PlaySafe Interlocking Playground Tiles - Designer Series don't require glue, but we do recommend using glue to keep them from separating and from getting stolen. We recommend using our Seam Sealer glue which is a polyurethane glue. This holds very tightly and is better to use outdoors since it is freeze/thaw stable.