Hull blistering

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  • Jono
    • May 2010
    • 85


    • 1996 SuperSport
    #1

    Hull blistering

    So I came real close to buying a SAN with this issue. I know it can happen when they sit in the slip too long - which was the case with this one.
    Now as I continue my search, I've came across a couple hulls where it was obvious they sat in slips and not up on lifts. I've seen coatings of algae, and stains from algae or whatever. But in these cases, there was no blistering to be found.
    My question is - how long does it generally take for blisters to develop? In these cases, the boats were winterized for the last 6 months. Would it be safe to say that if it was going to blister, it would have done so by now?
    Tags: None
    • Laptom
      Senior Member of PLANETNAUTIQUE
      • Oct 2003
      • 876

      • Eindhoven, Netherlands

      #2
      Do you mean osmosis? Some sort of gel coat bubbling?
      If so: We keep our boats in the water from April till October. From our last 10 boats only 1 had issues with Osmosis. It can happen with any brand (even Correct Craft), but generally it is not an issue. You have to keep an eye out for it though....
      230 with ZR6 running on propane

        Comment

        • Neverenough
          Senior Member of PLANETNAUTIQUE
          • Sep 2012
          • 907

          • Ft. Worth Texas

          • G
          #3
          I would imagine that the type of water would have a major roll in this. Salt or brackish is hard on finishes. Even fresh water that's heavy in minerals can be hard on them. I'm not sure what water osmosis is on a boat but if its sitting in the water for months at a time without anti fouling paint on the bottom it could be blistered.

            Comment

            • Chexi
              1,000 Post Club Member
              • Aug 2025
              • 2119

              • Austin

              • 2000 SAN
              #4
              Google hull blisters. I read up on this a few years ago, and my recollection may be fuzzy, but I think the primary culprit is in the manufacturing process. Less than ideal resin and hardener mix in the fiberglass can make a boat susceptible. No way to tell though until they happen.
              Now
              2000 SAN

              Previously
              1999 Air Nautique
              1996 Tige Pre-2000
              1989 Lowe 24' Pontoon / Johnson 100HP outboard

                Comment

                • Jono
                  • May 2010
                  • 85


                  • 1996 SuperSport
                  #5
                  It's no secret how it happens - poor manufacturing, or top notch manufacturing but sitting in water too long of any type. There's plenty to read out there...
                  http://www.smithandcompany.org/GRP/GRP.html
                  I just wanted to know if a nautique sat so long in a slip that its got a coat of algae on the bottom, when do you know it's not a risk anymore? Eg. If its been in a slip for a year and you pull it out today, you shouldn't be surprised if you find blisters next week. But if that same boat has been dry for 6 months, would blisters surface by now ? Or could you get a surprise in another 6 months?
                  Everybody emphasizes their boats as trailered and wiped down, or lift kept for a reason. Nobody wants to buy a boat that slept in the water. The nautique warranty department will be the first ones to tell you they are not supposed to sit in the water (happened to a friend). Some people get paranoid when they leave it in the water for 2 weeks on a vacation. That's excessive paranoia, but there is a point where you should be concerned. Just trying to figure that out

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