Centerboard casing sealant

[Derek Nixon]

We have just removed casing from our 16ft 1947 clinker buit Opera. Casing sits on the Hog which screws to the keel. Casing is 3.ft long 2ft high and houses a heavy swing down steel plate. The casing bolts down through the Hog and keel. Any ideas of sealing casing to Hog before bolting down.

 

[Keith 66]

Lots of choices here, My dad used to use Denso Tape which is a hessian fabric impregnated with thick sticky green goo, never dries. Good for cases in traditionaly built boats with screwed or bolted joints. I have used it & its good.
Also used Polysulphide sealant.
If its a plywood boat & case you would most likely glue the case in with west epoxy or similar.