Finally reinstalled the companionway hatch! - SailNet Community
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post #1 of 11 Old 03-16-2019 Thread Starter
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Finally reinstalled the companionway hatch!

https://youtu.be/llpn_vq5RJU
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Re: Finally reinstalled the companionway hatch!

Glad the second coat of contact cement worked. Let us know how it holds up over time.
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Re: Finally reinstalled the companionway hatch!

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Glad the second coat of contact cement worked. Let us know how it holds up over time.
That video was shot a few weeks ago, and I'm living on the boat so the hatch is opened and closed multiple times a day. So far, no problems. But the real test will be multiple years of use.
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Re: Finally reinstalled the companionway hatch!

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That video was shot a few weeks ago, and I'm living on the boat so the hatch is opened and closed multiple times a day. So far, no problems. But the real test will be multiple years of use.
I am about to take off my companionway hatch and I may have to do something similar. What kind of plastic rail is this? Source?

tx
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Re: Finally reinstalled the companionway hatch!

UHMW (ultra high molecular weight polyethylene) is usually used for applications like this. Just make sure it's the real thing. I bought some that claimed to be UHMW but proved to be otherwise.
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Re: Finally reinstalled the companionway hatch!

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I am about to take off my companionway hatch and I may have to do something similar. What kind of plastic rail is this? Source?

tx
In my case, there is a local marine store here in Fort Pierce that has a lot of salvage stuff. I dug through a shelf of recovered plastic sheets until I found this, then cut the strips to size.
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Re: Finally reinstalled the companionway hatch!

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In my case, there is a local marine store here in Fort Pierce that has a lot of salvage stuff. I dug through a shelf of recovered plastic sheets until I found this, then cut the strips to size.
OK, tx. I hope it will hold up over time and you won't have to do it soon again in case the material is not sufficiently resistant to abrasion.
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Re: Finally reinstalled the companionway hatch!

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UHMW (ultra high molecular weight polyethylene) is usually used for applications like this. Just make sure it's the real thing. I bought some that claimed to be UHMW but proved to be otherwise.
Thank you. I suppose this would be the real deal, right? https://www.mcmaster.com/uhmw-polyethylene-strips

The last point in their specs does give me a little pause (bolded by me):

Color: Off-White
Temperature Range: -20° to 180° F
Tensile Strength: 6,373 psi (Good)
Impact Strength: 16.8 ft.-lbs./in. (Excellent)
Hardness: Durometer 65D (Medium)
For Use Outdoors: No
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Re: Finally reinstalled the companionway hatch!

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For Use Outdoors: No
That probably means that the plastic is NOT UV stable. Meaning the sun will turn it brittle.

If it's shaded under a dodger, it _might_ last long enough to be worth using, but would be better to find an actual UV stable material.

I'm curious if there are materials other than plastic that might work better? I've seen boats with metal tracks but they also have metal on the opposite surface, so not sure if that would work with the way mine is designed?
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