I have a cal
20 sailboat with a cast iron keel
. There is a flange on the keel
where it connects to the hull
with keel bolts
. The cast iron flange is tapped so the keel bolt heads sit up in the keel some. Then the bolts pass through into the inside where they are held on by nuts and washers.
I wanted to check the bolts, so am taking off one nut at a time and pounding the bolt end so the whole bolt, head
first, pops out of the hull
from the keels underside.
After finding out that the bolts look nice, I am hoping to reseal them in their holes.
I am not planning to take off the keel and fair it etc. I am just planning to leave the rusty thing glued to the hull as is, and instead to check the bolts every year while the boat is sitting on its trailer.
I have several questions:
1) What sort of substance(s) should I use to re-fill in the tapped out portion on the outside keel flange in order to seal up the heads from the saltwater and re-waterproof my bottom side? epoxy
? some sort of fairing compound? (I am new to boat construction so specifics would be appreciated if possible.) The substance would be touching cast iron and the steel
. I am hoping for it to be strong, but not permanent so that I can re-check the bolt in a year or longer, and then repeat the process.
2) Should I clean the bolts with something and/or coat them in a substance to make them more protected from corrosion
in the case that salt water
starts to get in there?
Thank you in advance for any advice. Good day to ye' all.