Best Sealant For Intake Tunnel

[Ozark]

What is the best sealant to use for resealing the intake tunnel? I have seen members use 3M 4200, 3M 5200, Loctite marine adhesive/sealant, etc. My concern (especially with 5200) is the difficulty in removing it if you ever need to re-seal it later on down the road. Would a non-adhesive marine sealant do the job? From the looks of my intake tunnel, my boat must have been the last one to seal up before lunch break.

 

[hapyfishrmn]

I would get @2kwik4u's opinion he sealed his intake tunnel sometime back. There is a thread on it somewhere. He might be able to give an idea on how its held up and the longevity of the seals.

 

[2kwik4u]

Thanks @hapyfishrmn

Here's the thread where I sealed mine.

https://jetboaters.net/threads/hero-or-zero-resealed-my-jet-pump.17845/

March of 2018. I was under the boat a few weeks ago doing maintenance in the trailer and the tunnel still looks good. Have 162hrs on the boat now. I think I had about 75 then (total guess).

I'll respond more when I get back to a PC (on mobile now).

 

[Ozark]

@2kwik4u I read through yours and it is definitely informative. At this point I am just trying to determine which product is best suited for this application. I know you said the 3M 5200 was very hard to find locally so you settled for the Loctite marine adhesive/sealant. I don't want to be under my boat scraping away in a couple years wishing I would have used "the right" product instead. I've read that the 3M 5200 has excellent adhesion and is very likely to cause damage if it ever needs to be removed. I've not found any posts on here with warning of what not to use, so perhaps any good sealant rated for under waterline would suffice.