Marine sealant question off topic

[ArtJ]

I am installing a Moor Knotmeter in my Tartan 34 . I would like to swap
out the existing Horizon Transducer over a tide change. This means
that I need to use something that will either cure in under 2 hrs or
continue to cure underwater.
Does anyone have any suggestions? I have spoken to Moor they only
said they do not recommend using anything with polysulfide in it since
the fitting is Lexan.

I have also spoken to 3m marine. They said fast cure 5200 will work, but
needs air to completely cure.

Is there anything anyone has used from the hardware store or plumbing
store that would give me quick seal?
I have some liquid teflon tape that I used on my lawn sprinkler system,
but am reluctant to use it.

Any suggestion appreciated, especially if someone has used it to
seal a thru hull quickly then go underwater it

Thanks very much

Art

[ArtJ]

I forgot to add the fast cure 5200 needs 24 hrs to cure.

[hanleyclifford]

How about that stuff they call "plumber's putty"? Used to seal shower drain flanges and such.

[ArtJ]

Thanks for the suggestion, I am a little reluctant to use plumbers putty
thou. I was hoping someone knew of a super fast cure silicon or rubber
sealant without polysufide. or some old time sealant like a super thickened
permatex>

Thanks appreciated

[ArtJ]

How quick do the permatex form a gasket tubes cure?

[hanleyclifford]

You could also use Dolphinite. I used to use it for bedding, til I realized that roofing tar works just as well.

[ArtJ]

What is Dolphine (sp?) where can it be obtained.

I also noe wonder about
butyl rubber. I used some to seal port lights. It stays very stick and
I wonder if it contains polysulfides?

[hanleyclifford]

Dolphinite by Woolsey #2005N is in the West Marine catalog in maintenance section. Excellent bedding compound.

[Dave Neptune]

Gooh

What Hanley said, he beat me to the punch! It won't dry out and I have never seen it leak!

Dave Neptune

[Jesse Delanoy]

Not to pee in the punchbowl or anything, but I think if I were re-sealing a hole on the bottom of my boat, I'd wait for the next haulout and do it properly, with the right materials and the right amount of time before splashing it.

I'd hate to be at sea and have water start leaking in around the transducer. My folks had that happen to them cruising the Bahamas many years ago. They were starting to get exhausted taking turns on the manual bilge pump (either did not have an electric, or it was being overwhelmed), until my dad got the bright idea of diving over the side with the plunger from the head, and sticking the big suction cup over the thru-hull fitting. They were then able to wait until a large yacht arrived in the area with repair materials.

I'm told that, shortly after that, word spread and you couldn't buy a plumber's helper in the Bahamas for love or money, for some period of time.

[ArtJ]

Thanks

Do you know if it contains sulfides or something that will attack lexan/

I will check the west catalog

Regards

[lat 64]

Sounds like you have the right advice, but I would stay away from plumbers putty. I think it is made from fine clay and linseed oil. It is made so you can undo a drain or pull up a sink to repair.
I hate the stuff—it always leaks!

Awesome advice regarding plumbers helper. I have the mini version on my boat.

[tenders]

I've replaced throughhulls with the boat in the water using 5200 with no cure time in the air at all. Somehow, eventually, the stuff does cure underwater.

Butyl can be used to seal Lexan and every other type of hatch; it shouldn't have the destructive chemicals that polysulfide has. I love the stuff but I wouldn't use it below the waterline.

[ArtJ]

Thank you perhaps I will go ahead and use fast cure 5200.

How long has the thru hull be in use afterwards?

Thanks again

Art

[ArtJ]

By the way, It is Delrin, not lexan ( my typo) There is also a neophrene
gasket on the outside of the hull to accommodate a bevel in the xducer.
I did not wish to bevel out the xducer hole, so the mfr MOOR, provides
the gasket as a alternate method.

Thanks