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post #11 of 15 Old 06-13-2019
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Re: Gelcoat cracks/crazing

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Originally Posted by Vssman View Post
Thanks guys! I am looking at barrier coat. Sea Hawk Tuff Stuff has a nice long recoat window. Either that or Pettit Protect. I already have Pettit bottom paint so it probably would be best to stay with the same product line.
There was a thread on here that was very negative about Se Hawk's bottom paints. Because of that thread and since I am working at West Marine one night a week I have been asking users of Sea Hawk about their experiences. Most have not used it long enough to have an opinion but I did speak with a customer who was very negative about his experiences with Sea Hawk products and I believe that included a Sea Hawk barrier coat.

Personally, I have used both Interprotect and PetitProtect. I like the Petit Protect better since it is a much higher build per coat than the Interprotect.

I agree with the suggestion to flip the boat over and work on it upside down. Using a scraper, I would suggest that you make sure than any loose gelcoat is removed. Given the extent of the crazing and the microcracking, I personally would put down a base coat of 105/205 if I planned to keep the boat for more than a couple- three years, but I am a bit of a belt ans suspender guy.

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post #12 of 15 Old 06-13-2019
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Re: Gelcoat cracks/crazing

I use to think that a coat of west system on the gelcoat first was good idea until I did some tests and found that it served no real purpose but to add expense and a whole lot more sanding. we even used to it on things made with west system. there was no difference in how good the barrier coat adhered to the gelcoat. but if left unsanded it did make the barrier coat peal easier. so if you miss a spot sanding it can cause peeling of the barrier coat. the resins in the barrier are similar resins to the west system resin only with a filler added and no amine blush to remove before overcoating . they are designed to stick to gelcoat. West system was used years ago before we had good barrier coating products and makes a good barrier epoxy coating but the new tech products that are now being manufactured are just as good if not better and are easier to use and help make the job less time consuming. Pettit protect high build is now become my go to protect and we are even using it on some of the Aircraft composite parts that we build.

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post #13 of 15 Old 06-14-2019 Thread Starter
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Re: Gelcoat cracks/crazing

Thanks for all of the advice. I appreciate it. On my way back from RI this afternoon, I stopped in at Defender Marine. There's now a couple of gallons of Pettit epoxy barrier coat in my garage. I picked up a lifting strap and plan on flipping over the boat, finishing the sanding, and then rolling on 3 coats of barrier paint followed by 2 coats of bottom. Epoxy fill only areas that have loose gelcoat or voids. Before that, go inside and screw down the plywood decking that the factory only nailed down to stiffen up the hull a bit. Looseness of the nails may have allowed the hull to flex a lot resulting in some of the cracking (or so I think).
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post #14 of 15 Old 06-15-2019 Thread Starter
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Re: Gelcoat cracks/crazing

And she's upside down!
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post #15 of 15 Old 06-20-2019
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Re: Gelcoat cracks/crazing

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Originally Posted by overbored View Post
Pettit protect high build is now become my go to protect and we are even using it on some of the Aircraft composite parts that we build.
What parts are you making and use this for?
I fly a Long EZ.
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