Thru Hull fitting

[ProfessorM]

I am racing to get my other boat ready, late as usual, and I noticed the thru hull rule pump for the raw water wash down is busted off at the fitting that attaches to the hose. Good thing the gas tank comes out and it was so that I noticed or it would have probably sank. I gave up on the raw water wash down years ago as I prefer using just a bucket and will just plug the hole left by the pump. The thing is I had a bitch of a time getting the thing out. It seemed it was just put in with a flexible sealant but I had to hack saw the threaded part out as I busted the pump off and the threaded part was left in the transom. Thing was really in there. I got it out and will make a stainless thru hull at work tomorrow with a pipe thread thru it and use it for an additional drain. I will put a 3 hole bolt pattern in it and screw it to the transom. What I am interested in is what do I bed it in with to seal it from water intrusion. Paul