Poolcenter

The flight is approximately one drop every 10 seconds, coming off a masseur Roundy round old school through the underside. Should I use silicone caulking to obtain regular or "nitrile rubber-based sealing a" as the third picture down here http://www.poolcenter.com/repair_supplie ...
Thank you for any help, professional advice, but would help the most.

they are a marine sealant sold in local stores that you might want to check.