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 What type of epoxy?		  New Topic  Topic Locked
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kevinmac
Admiral

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USA
732 Posts
Initially Posted - 06/30/2006 :  00:18:29  Show Profile
I am installing an external GPS antenna on my C250 this weekend. (Decided to use the location you recommended Paul. Now that I have pulled the mast down and trailered it again, I can see that the location I had in mind would not be good when trailering.) I plan to use the "drill oversize, fill with epoxy, then redrill" method, followed by polysulfide sealant.

What type of epoxy should I use? Can I just get 5 min epoxy from the hardware store? I went to West Marine and looked for the right stuff, but they only had it in huge quantities. The salesman at WM made an impassioned plea that I use 5200 instead - drill the hole, fill with 5200, let it harden, then drill again. He said 5200 was so hard after it dried that I could tap it...

Your help and opinions would be appreciated.
Kevin Mackenzie
Former Association Secretary and Commodore
"Dogs Allowed"
'06 C250WK #881
and
"Jasmine"
'01 Maine Cat 30 #34
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Downbucket
Navigator

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USA
188 Posts
Response Posted - 06/30/2006 :  04:31:53  Show Profile
Kevin:

I don't have a suggestion on what to use but if you do use 5200, Wal-Mart sells the small tube for a lot less than West Marine. It's in the aisle with boat stuff.

Will
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atgep
Master Marine Consultant

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1009 Posts
Response Posted - 06/30/2006 :  08:01:23  Show Profile
I would not recommend 5200. It will create a seal but not a chemical bond. 5-minute epoxy is good but it is not UV resistant. I would suggest a trip to locally owned boat place. Some will have bulk supplies and will sell you the small quantity you need. Polyester or epoxy resin is what you need .You will need to thicken it and put some color in it. Another viable option is Marine-tex. It is a thick epoxy that comes in white. JB Weld is another bullet proof epoxy but I have only seen the grey stuff.

I hope this helps.

Tom
Edited by - atgep on 06/30/2006 08:02:23
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Tom Potter
Master Marine Consultant

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USA
1913 Posts
Response Posted - 06/30/2006 :  14:04:30  Show Profile
Kevin,
I was just reading a [url="http://bbs.trailersailor.com/forums/tsbbcomp/trailersailor/index.cgi/read/507995"]thread[/url] on the trailer sailor BB on that.
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kevinmac
Admiral

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USA
732 Posts
Response Posted - 06/30/2006 :  20:01:50  Show Profile
Very good thread Tom. Thanks for the answers everyone.
Edited by - kevinmac on 06/30/2006 20:02:12
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britinusa
Web Editor

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USA
5404 Posts
Response Posted - 07/02/2006 :  21:33:08  Show Profile  Visit britinusa's Homepage
go to home depot and buy their 2 part epoxy resin for fiberglass repairs.

We struck gold one weekend! Found a Gallon of it with the catalyst for $8.00!!!!! (Did a search to see if they had a 2nd can

I find that having the stuff handy makes it a lot more likely that I'll use it!

Re: installing the antenna.
I drilled an oversized hole for the cable and for the 3 screws. Ream out beyond the holes to remove the core from the area.
Then reach from underneath via the access panel just by the light on the port side of the quarter berth and put some masking tape in place.

Fill the holes with a mixture of the resin and poke some glass fibers into the mixture, allow for shrinkage.

When dry (about an hour) cut off any excess resin mixture and remove the tape. Now drill the correct sized holes for the cable and screws.

Before fixing it in place, seal the whole area marine sealant. Use mineral spirts to clean up quickly.

Paul.
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kevinmac
Admiral

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USA
732 Posts
Response Posted - 07/02/2006 :  23:00:55  Show Profile
Thanks Paul. I am in the middle of the install. Have just recovered from "oh crap I have to drill a big hole in my boat" stress syndrome. Your suggestion for the antenna install is very clear, and I will follow it tomorrow.

Please see my other post about the hole in my cabin bulkhead.

Thanks for the help.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
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