Re-adhering gasket to Bomar Hatch

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Project_Mayhem

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Sep 24, 2018
3,791
Catalina 30 MKIII Chicago
The gasket on my forward hatch has come loose in the corner. On Hatchmaster's website they list the SI 5000cp adhesive. A quick search reveals that this is a cyanoacrylate type adhesive. Is there any reason that any other CA type glue wouldn't work?

Any tips for re-adhering from those that have done it in the past? We're seeing temps around 40F at the moment
 
dLj

dLj

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Mar 23, 2017
4,671
Belliure 41 Back in the Chesapeake
Project_Mayhem said:
Do you happen to know the expected lifetime of the gasket? Mine is going on 31 years
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I doubt anyone knows the answer to this question.

Here's my rule of thumb: if I'm sailing near shore, I'll just make things work and when it gets too many "fixes" I change them. If I'm going offshore and there is any question, I simply change them. That being said, changing gaskets is not always just change and go. They have to be tested as it isn't always a given the new seal fully seals....

You also look at the gasket material to see if it's looking degraded, typically you see small cracks on the surface. It it looks degraded, replace.

dj
 
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Ralph Johnstone

Ralph Johnstone

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Jan 4, 2006
7,390
Hunter 310 West Vancouver, B.C.
I have one Bowmar and two Lemar hatches 25 YO. I've had the advantage of applying an automotive rubber, vinyl, whatever cleaner and preservative since the boat was around new. Anybody's well known product is equally as good. I used to use something by Meguiars and now I use Mother's Back to Black at 1/3 the price :

General PDP Template

www.canadiantire.ca www.canadiantire.ca

The gaskets could pass for brand new right now @ 26 years old. I try to apply once a year but don't get out of joint if I miss a year or so. Even after a missed year, they still have that slick siliconey (my invented word) feel to it. They spend most of their time sealed off from the elements no great accomplishment in chemistry.

I know @dLj is going to smack me upside the earhole for saying this, but seeing as how they look brand new right now, I have carefully estimate their life expectancy to be "when Hell freezes over" when protected with a product.
 
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dLj

dLj

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Mar 23, 2017
4,671
Belliure 41 Back in the Chesapeake
Ralph Johnstone said:
I know @dLj is going to smack me upside the earhole for saying this, but seeing as how they look brand new right now, I have carefully estimate their life expectancy to be "when Hell freezes over" when protected with a product.
Click to expand
Hahaha - no way!

That is exactly what one should be doing - especially monitoring them... They don't really have a defined lifespan. Mine are over 40 years old and still sealing well...(I hate saying this, lord knows, next spring that may now change!)

dj
 
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Project_Mayhem

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Sep 24, 2018
3,791
Catalina 30 MKIII Chicago
The 48 year old seal on my O'Day 25 was still doing its job when I sold it last year. I don't know if it was the same material. Since the hatch was fiberglass, it had very little UV exposure
 
capta

capta

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Jun 4, 2009
4,994
Pearson 530 Admiralty Bay, Bequia SVG
How long those gaskets probably depends on where the boat is stationed. I used silicone when I replaced mine, as I wanted to easily replace one if it got damaged.
Don't ask how, we charterd and those landlubbers could find the oddest way to accidentally do small bits of damage, unintentionally.
 
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