Tranona
Well-known member
As I suggested earlier the thread really does not need any specific sealer. The seal to stop water getting into the boat is around the tube and the face of the hull. Clean up both of the faces, put a ring of polysulphide around where the tube enters the hull and coat the face of the hull side with sealant. Screw up the housing until it is firm and you can get the locking screws in, remove excess sealant - job done.