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Old 18-07-2014, 14:55   #16
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Re: Barrier Coat Question

Also, you mentioned bare glass, but the gelcoat is very much in tact and, for the most part, in really good shape. There isn't any true bare fiberglass exposed. Does that change things?


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Old 18-07-2014, 14:58   #17
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Re: Barrier Coat Question

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Also, you mentioned bare glass, but the gelcoat is very much in tact and, for the most part, in really good shape. There isn't any true bare fiberglass exposed. Does that change things?


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Uh, yeah!


So sorry, I read your first post wrong!



You are good to go. Just fill any pinholes with 3M premium filler between coats of 2000. They should only be in filler or bare glass spots.


Again, sorry to scare the crap out of you! Thought you were at bare glass...
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Old 18-07-2014, 15:10   #18
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Re: Barrier Coat Question

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Uh, yeah!


So sorry, I read your first post wrong!



You are good to go. Just fill any pinholes with 3M premium filler between coats of 2000. They should only be in filler or bare glass spots.


Again, sorry to scare the crap out of you! Thought you were at bare glass...
You're a mean Baaaaastrid....
(whew... good thing Astrid is a chick, or I would use that one...)

Hope things are gettin' better man... really...
E
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Old 18-07-2014, 15:11   #19
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Re: Barrier Coat Question

Phew! I think I'll have a beer now to bring my blood pressure back down. I was ready to go slap a "for sale as is" sign on the boat!

Thanks for following back up so quickly, and glad to hear we might still be able to splash her next weekend and salvage a bit of summer!


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Old 18-07-2014, 15:44   #20
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Re: Barrier Coat Question

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Phew! I think I'll have a beer now to bring my blood pressure back down. I was ready to go slap a "for sale as is" sign on the boat!

Thanks for following back up so quickly, and glad to hear we might still be able to splash her next weekend and salvage a bit of summer!


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Least I could do. Sorry to mislead ya, go coat that boat and go sailing!
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Old 18-07-2014, 16:24   #21
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Re: Barrier Coat Question

I'm in the "hot coat" camp. Epoxy resin sands hard! Pros did one boat with resin/2000/ then bottom paint. It was a very long 24 hours...
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Old 19-07-2014, 15:27   #22
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Re: Barrier Coat Question

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...Just fill any pinholes with 3M premium filler between coats of 2000. They should only be in filler or bare glass spots....
Hitching a ride here....

Minaret, I have a keel repair which is bare fibreglass (no gel coat), but I used epoxy resin exclusively, does the suggestion of 3M filler bt 2000 coats also applies for epoxy?
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Old 19-07-2014, 15:50   #23
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Re: Barrier Coat Question

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Hitching a ride here....

Minaret, I have a keel repair which is bare fibreglass (no gel coat), but I used epoxy resin exclusively, does the suggestion of 3M filler bt 2000 coats also applies for epoxy?

Sure, as long as you're just filling pinholes or very small imperfections. Chemical bond the filler to the 2000, let it kick, sand out, and continue coating as normal.
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Old 21-07-2014, 08:27   #24
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Re: Barrier Coat Question

Got it done! It all went pretty smoothly and quickly except for the areas under the pads...lots of thumb twiddling time waiting for one or two to dry so we could raise them and lower others. All that is left is to paint a new boot stripe, give her a quick polish and wax, a new prop shaft anode, and then get back in the water.

First couple of barrier coats:
Click image for larger version

Name:	ImageUploadedByCruisers Sailing Forum1405952310.751777.jpg
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ID:	85308


Second set of barrier coats (the first gallon of epoxy was a bit older and quite a bit lighter in color:Click image for larger version

Name:	ImageUploadedByCruisers Sailing Forum1405952401.906750.jpg
Views:	80
Size:	285.7 KB
ID:	85309

And finally done after 2 coats of bottom paint.
Click image for larger version

Name:	ImageUploadedByCruisers Sailing Forum1405952594.939867.jpg
Views:	81
Size:	314.1 KB
ID:	85310
Click image for larger version

Name:	ImageUploadedByCruisers Sailing Forum1405952636.606741.jpg
Views:	78
Size:	325.7 KB
ID:	85311

Thanks again to all for the advice and encouragement. The knowledge and experience level on this forum never fails to be tremendously helpful!


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Old 21-07-2014, 10:18   #25
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Re: Barrier Coat Question

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Got it done! It all went pretty smoothly and quickly except for the areas under the pads...lots of thumb twiddling time waiting for one or two to dry so we could raise them and lower others. All that is left is to paint a new boot stripe, give her a quick polish and wax, a new prop shaft anode, and then get back in the water.
AWESOME MAN!

You can tell by the pics that the crew is beyond anxious to get that baby splashed....

But first you need to join minaret and me into scaring the shizit outta somebody else by finding a post and telling them they have another 50 hours of required work, when they thought they were already done...
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Old 21-07-2014, 13:34   #26
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Re: Barrier Coat Question

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AWESOME MAN!

You can tell by the pics that the crew is beyond anxious to get that baby splashed....

But first you need to join minaret and me into scaring the shizit outta somebody else by finding a post and telling them they have another 50 hours of required work, when they thought they were already done...



+1!! Heartless...
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Old 21-07-2014, 17:41   #27
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Re: Barrier Coat Question

Just. Curious question, what is life expectancy of barrier coats?

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Old 22-07-2014, 05:27   #28
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Re: Barrier Coat Question

Epoxy coat will last and the limitations come from use and abuse rather than from sheer aging - like the boatyard personnel placing props where they should not.

The hull will give in somewhat, cracks may appear. Localized pressure is worst, like an impact, be it with a large blunt object too.

Our coat is full of cracks by now (on a very stiff hull otherwise) and I am about to renew. This is 10+ years. Mind our boat was used and abused to the highest extent.

I think in a modern bendy flexy the coat may last less, but I do not have any proof of that, just my guess.

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Old 22-07-2014, 10:31   #29
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Re: Barrier Coat Question

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Epoxy coat will last and the limitations come from use and abuse rather than from sheer aging - like the boatyard personnel placing props where they should not.

The hull will give in somewhat, cracks may appear. Localized pressure is worst, like an impact, be it with a large blunt object too.

Our coat is full of cracks by now (on a very stiff hull otherwise) and I am about to renew. This is 10+ years. Mind our boat was used and abused to the highest extent.

I think in a modern bendy flexy the coat may last less, but I do not have any proof of that, just my guess.

b.



Yeah, that's not normal. I work on boats we coated 20 years ago occasionally, and I haven't seen any crazing at all in any of them. Most look just like the day they were coated when you sand off the anti fouling. Only problems I have seen is a very small reoccurrence of localized blisters in hulls we air dried before acquiring a hot vac, a long time ago.
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Old 22-07-2014, 15:43   #30
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Re: Barrier Coat Question

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Yeah, that's not normal. I work on boats we coated 20 years ago occasionally, and I haven't seen any crazing at all in any of them. (...)
Yep.

Ours went thru well over 40k Nm.

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