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Old 30-10-2018, 11:21   #1
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Priming polyester for below water?

My question is I have a polyester resign repair on our boats keel. I need to apply bottom paint on this repair. Do I need to prime paint the repair before the application of bottom paint? If so what primer is recommended?
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Old 30-10-2018, 13:59   #2
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Re: Priming polyester for below water?

You need an epoxy primer. The best bang for the buck is Inter Protect 2000.
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Old 30-10-2018, 15:34   #3
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Re: Priming polyester for below water?

I guess I wasn’t real clear in my question. What I want to know is do I need a primer before the boat anti fouling paint is applied. Putting on a epoxy barrier coat on 1 percent of the below waterline of the Hull won’t do much. I just want my bottom paint to adhere good or satisfactorily.
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Old 30-10-2018, 15:45   #4
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Re: Priming polyester for below water?

Quote:
Originally Posted by freshalaska View Post
I guess I wasn’t real clear in my question. What I want to know is do I need a primer before the boat anti fouling paint is applied. Putting on a epoxy barrier coat on 1 percent of the below waterline of the Hull won’t do much. I just want my bottom paint to adhere good or satisfactorily.
Yes, use the primer specified by the manufacturer of the anti fouling paint. My boat has Altex soft anti fouling and any sus spots were primed with a silvery colour primer whose name escapes me.
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Old 30-10-2018, 16:06   #5
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Re: Priming polyester for below water?

Inter Protect 2000 is not just a barrier coat, it is also a very good primer filler for metal or composite.
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Old 31-10-2018, 14:06   #6
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Re: Priming polyester for below water?

Just use grey primer, the International P10 or Altex multi purpose grey primer is compatible under any of the antifoul paints. Just follow the directions on the antifoul paint tin.
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Old 31-10-2018, 16:06   #7
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Re: Priming polyester for below water?

I’m in Florida and google international P10 and Altex multi purpose grey and come up with nothing. ???
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Old 31-10-2018, 23:03   #8
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Re: Priming polyester for below water?

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Originally Posted by freshalaska View Post
I’m in Florida and google international P10 and Altex multi purpose grey and come up with nothing. ???



All the major antifoul paint companies have their version of special grey multipurpose primers. Just use the one recommended on the antifoul paint tin. I like The Jotun variety.
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