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04-24-2017, 12:41 PM
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#21
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Guru
City: Gig Harbor
Vessel Name: Kinship
Vessel Model: North Pacific 43
Join Date: May 2015
Posts: 9,046
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I would add my support to the idea of first checking the hatch seals. Then if you do need to rebed, I would suggest the butyl tape. Just avoid silicone at all costs.
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04-24-2017, 01:06 PM
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#22
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Guru
Join Date: Oct 2007
Posts: 22,553
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Dolphinite is my favorite as it is easy to clean off when the time comes.
The tape sealants work best with hatch for window flanges designed for its use .
5200 never, and any goop that hardens in the tube after its open is not for my use.
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04-24-2017, 08:52 PM
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#23
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Guru
City: Ashland, MA
Vessel Model: 1990 Silverton 40 aftcabin
Join Date: Jul 2016
Posts: 1,208
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This year I plan to try using Phenoseal in lieu of 5200. 5200 can be a BPITA because once you open a caulking tube, plan to use it all....soon! The small tubes with a cap seem to survive without problems though.
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04-24-2017, 09:38 PM
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#24
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Guru
City: Wilmington, NC
Vessel Name: DreamQuest
Vessel Model: Prairie 36
Join Date: Jan 2016
Posts: 550
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My Bomar hatches were also leaking. However, my leaks were between the lens and metal frame. After removing the old sealant from the gap between the lens and metal frame the lens came out with very little pressure. Cleaned everything and re-bed with Dow Corning 795. Leaks are gone.
Well almost. Now getting a new very slight leak between the hatch and deck.
In the past I've used a bedding compound like 4200 but didn't completely tighten the item to the deck. I would just tighten the screw or through bolt enough to secure the item. Wait a few days until the bedding compound was completely cured and then completely tighten the item to the deck. Now instead of the bedding compound oozing out it compresses to make a tighter seal, more like a gasket.
However, with what I have read here I may use butyl tape for this project.
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04-24-2017, 10:07 PM
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#25
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Guru
City: Port Townsend
Vessel Name: The Promise
Vessel Model: Roughwater 35
Join Date: Sep 2012
Posts: 1,569
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04-25-2017, 05:30 AM
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#26
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Guru
City: Cary, NC
Vessel Name: Skinny Dippin'
Vessel Model: Navigator 4200 Classic
Join Date: Jul 2009
Posts: 5,841
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Quote:
Originally Posted by foggysail
This year I plan to try using Phenoseal in lieu of 5200. 5200 can be a BPITA because once you open a caulking tube, plan to use it all....soon! The small tubes with a cap seem to survive without problems though.
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I don't use 5200 for anything anymore. Not even for underwater projects. And I would never say to use it on something like a hatch. That stuff just makes any future removal a huge pain. Sik-a-Flex is superior in so many ways.
__________________
2000 Navigator 4200 Classic
(NOT a trawler)
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04-25-2017, 07:32 AM
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#27
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Guru
City: Signal Mtn., TN
Vessel Name: Stella Maris
Vessel Model: Defever 44
Join Date: Feb 2012
Posts: 2,742
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Quote:
Originally Posted by Tom.B
I don't use 5200 for anything anymore. Not even for underwater projects. And I would never say to use it on something like a hatch. That stuff just makes any future removal a huge pain. Sik-a-Flex is superior in so many ways.
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Tom (and all), which Sikaflex do you use for bedding fittings . . . and which for seams that are exposed to UV? How does the latter hold up to sun exposure? Thnx.
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04-25-2017, 12:28 PM
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#28
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Guru
City: Cary, NC
Vessel Name: Skinny Dippin'
Vessel Model: Navigator 4200 Classic
Join Date: Jul 2009
Posts: 5,841
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Quote:
Originally Posted by angus99
Tom (and all), which Sikaflex do you use for bedding fittings . . . and which for seams that are exposed to UV? How does the latter hold up to sun exposure? Thnx.
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295 above the waterline, 291 below it.
__________________
2000 Navigator 4200 Classic
(NOT a trawler)
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04-25-2017, 08:16 PM
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#29
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Veteran Member
City: Elkton
Vessel Name: Change of Pace
Vessel Model: Mainship
Join Date: Jul 2016
Posts: 68
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I very much appreciate all the thorough input. I am a bit nervous about wood rot now (Thanks RCook😉 but will get a good look at all the parts to come off before I do anything. First, as suggested by Tom.B, I'll check other possible leaks sources.
Hopefully I won't have to remove the head liner in the cabin below the hatch to complete the job correctly.
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04-26-2017, 05:45 AM
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#30
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Guru
Join Date: Oct 2007
Posts: 22,553
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" I am a bit nervous about wood rot now"
Wet wood does not rot, Dry wood does not rot.
Wood rots when going from wet to dry or dry to wet.
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04-28-2017, 06:01 AM
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#31
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Senior Member
City: Newburgh, Indiana
Vessel Name: Quiet Company
Vessel Model: Great Harbour GH-47
Join Date: May 2012
Posts: 265
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Butyl Tape fixed mine!
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05-11-2019, 01:46 AM
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#32
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Senior Member
City: Pensacola
Vessel Name: CLASSEA
Vessel Model: 1988 Defever 41
Join Date: Apr 2017
Posts: 160
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Well initially tried rebedding with Black 4200 . . . Didn’t work, today attacked it again using “bed-it butyl tape” then DOW 995 black silicone. The glass guy at Saunders Marine said that is what he used. A bit hard to find . . . However after research and talking to supplier convinced it will work.
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