Nauti is still taking water when afloat and the keel box is now the likely culprit. Has anyone got any exoerience of how to rebed or reseal the two part enclosure?

Can it be lifted through the deck if the keel is extracted and the (self-tapping!) screws remived?

All responses welcome

Latest update, seacocks removed and glassed over (ports potti to be sourced), bottom of keel box and joints sikaflexed by Paskins Marine. Nauti has been afloat for 10 days and is bone dry inside. Shakedown sail when it turns warmer and the job is a good one, finally!