I am preparing to re-install my rudder
tube (and re-built rudder).
The seal at the thru-hull had failed; Luckily the fitting is only a few inches below the waterline and the compartment where it enters the hull
has a water-tight bulkhead.
The failure seems to be due to hydraulic leaks
from the steering gear
. While on the hard
the seal that failed had a pool of hydraulic fluid around it and some was seeping through to the outside of the hull
The original sealant
seems to be clear silicone; Most of the fittings on the boat are bedded with this and it seems to have worked well.
What I am worried about is that the fiberglass
around the thru-hull seems to be saturated with oil
. I scraped off the silicone, washed, de-greased and wet sanded the area. But, there still seems to be oil
in the glass.
Any advice or ideas on products or procedures to use would be appreciated.