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Go Back   SailNet Community > On Board > Gear & Maintenance
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  #11  
Old 06-11-2013
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Re: Leaking Window-Hatch

Which Bomar hatch do you have? I have an old one with a metal frame and a plexi lens over my v-berth on my P-30, and when I first bought the boat it would flood the v-berth when it rained. I did the hose test on a dry day...have a dockmate hold the hose while I went below to check for ingress. For me, the water was coming in between the plexi and the frame. I spent a few hours one afternoon and removed the old silicone that was holding the lens in place, removed and cleaned the lens and the frame and used 3M 4000 in black inside and out. No leak since...not even last night with all the rain we had. If you haven't done so yet, have someone stand topside and run a hose over the hatch and observe where the water is entering.
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  #12  
Old 06-14-2013
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Re: Leaking Window-Hatch

So, I took advantage of a heavy rain to see from where the leak orignated on this hatch. I can tell from the weeping water that it is actually the glazing around the lens/glass, not the gasket seal.

Would the next step to be to completely cut out the glazing (seems like a silicone caulk) and then re-glaze? I'm looking on the web now for some how-to demos.

You can see from this photo (if you look closely) that the caulking is compromised around the corner.

[IMG][/IMG]
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  #13  
Old 06-14-2013
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Re: Leaking Window-Hatch

Quote:
Originally Posted by TheTardis View Post
Which Bomar hatch do you have? I have an old one with a metal frame and a plexi lens over my v-berth on my P-30, and when I first bought the boat it would flood the v-berth when it rained. I did the hose test on a dry day...have a dockmate hold the hose while I went below to check for ingress. For me, the water was coming in between the plexi and the frame. I spent a few hours one afternoon and removed the old silicone that was holding the lens in place, removed and cleaned the lens and the frame and used 3M 4000 in black inside and out. No leak since...not even last night with all the rain we had. If you haven't done so yet, have someone stand topside and run a hose over the hatch and observe where the water is entering.
Sorry, Tardis ... I didn't see your post at first. I have the Bomar High Profile hatch, Bomar is currently selling a 2000 series that looks pretty similar even 34 years later. Yup, I think that sounds like what I have to do as well. Were you able to lift out the lens simply by digging out the caulk from the outside?
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  #14  
Old 06-14-2013
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Re: Leaking Window-Hatch

The hatch experts (Select Plastics) recommend DC795 as the sealant/adhesive of choice for this kind of job.

Select Plastics, LLC: Marine Hatch Repair
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Old 06-14-2013
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Re: Leaking Window-Hatch

Quote:
Originally Posted by dvuyxx View Post
Sorry, Tardis ... I didn't see your post at first. I have the Bomar High Profile hatch, Bomar is currently selling a 2000 series that looks pretty similar even 34 years later. Yup, I think that sounds like what I have to do as well. Were you able to lift out the lens simply by digging out the caulk from the outside?
Yes, I was able to completely remove the lens. Head over to this link: Red Lady's New Ride - Cruising Anarchy - Sailing Anarchy Forums

I documented the entire process. You should find it on the first page of the thread toward the bottomw. I hope that is helpful!

Jess
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Old 08-31-2013
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Re: Leaking Window-Hatch

Regarding using DC795 sealant (caulk) for sealing the windows. In my previous career I ran a global pilot plant for the sealants business at Dow Corning for about 12 years, and made tons of Silicone and Acrylic Sealants. DC sealants are also bought by DAP and numerous other suppliers and packaged under their own brand names. The key to this working is that it is an "acrylic" sealant with anti-fungal agents.

Almost any acrylic sealant will work however you MUST make sure it is for use in wet areas. Most are labeled as anti-fungal (mold resistant) but any bathroom acrylic will work. Most aquarium manufacturers use the clear acrylic version to seal theirs. You can easily tell if it is acrylic by smelling it, yup - just smell it. If it has a very strong "vinegary" smell then you have the right stuff.

A little late to help the OP out but figured I put this out there as well as offer my assistance for any future questions regarding sealants.

Edited to add that the best acrylic type sealants use an "Acetoxy" curing agent for their strength.

Last edited by jeepjeff; 09-01-2013 at 02:25 AM.
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