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Go Back   SailNet Community > On Board > Gear & Maintenance
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  #1  
Old 12-13-2006
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Question What to use for Primer

The blister repairs on the hull and rudder will soon be completed. So, now I'm looking for recomendations on what to used between the gelcoat and the anti fouling paint.
Your input is appreciated.
Duke
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Old 12-13-2006
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We've had good luck with Interlux Interprotect. It was suggested to us to put on as many coats as you could up to 6 - 8. We did that after a relatively mild blistering condition/repair, and it's still good 5 years later.

btw this is meant to be a barrier coat.
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Old 12-13-2006
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Ditto...we had two coats put on after stripping our bottom 2 years ago (no blisters!) ,and we still have none despite constant immersion in warm salt water since.
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Barrier Coat

My yacht broker used Interlux Interprotect barrier coat on my new boat 2 years ago. They followed Interlux's directions and used 5 coats, followed by 2 coats of anti-fouling. It is supposed to act as a "water proof" barrier and prevent blistering, as all fibreglass will slowly absorb water over time without something like this.
So far no problems, but it is only 2 years.
Hope this helps,

Tom
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Interprotect was used on mine with great results. Pettit has a competitive product. The key ingredient is epoxy resin which cures to form the moisture barrier.

Whatever you use, put on at least the recommended dry mil thickness, no matter how many coats it takes.
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Old 12-14-2006
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Thanks for the input. I had been considering the Intelux Interprotect, but decided to see if there were aother products I should investigate. I am still open to suggestions.
Duke
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Old 12-14-2006
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Duke.
A good link to Interlux products..... click on the Interprotect bulleton... http://www.yachtpaint.com/usa/
Bill,
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Old 12-14-2006
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Awlgrip has a pretty good system,that I am using on a 42' custom morgan that has minor gelcoat blistering. have used it on the runabout with pretty good results.
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tigerregis has a little shameless behaviour in the past
I used Interlux 1000 in 1990. The boat was in fresh water for 9 years and has been in salt(brackish) for seven. There is no sign of blisters. This is one product that seems to deliver. Highly recommended as it is an economical prophilactic. IMHO.
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I have just used the Petit barrier coat product this past spring...we'll see how its doing by this spring.

You should apply your first coat of bottom paint before the final barrier coat dries and cures so you get them "bonded" together. Also, using different colors for the two coatings of bottom paint will aid in knowing when to apply another coat at the next hauling.

Good luck.

Last edited by T37Chef; 12-14-2006 at 08:20 PM.
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