3M 5200 and 'hull seal'

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  • Jono
    • May 2010
    • 85


    • 1996 SuperSport

    3M 5200 and 'hull seal'

    I have a bad feeling that using 5200 was the wrong choice. I finally found the source of water leaking into my 96 Supersport. The bad area is the under the rear rub rail - where the outer hull is sealed to the inner hull. Its at the level of the swim platform, so it drops below the waterline a fair bit and takes on a decent amount of water. A fair sized chunk of factory sealant had broke away - maybe about an inch of it. I cleaned it up, and stuffed a bunch of 5200 into the gap from inside the boat, and the outside. Applying this stuff on the outside was a major pain because I had gravity working against me - The inner hull overhangs the outer, so the sealant is applied from the bottom up and under the lip. Its pretty much impossible to fill all the air spaces up there and not have it drip out the bottom. I held it up with some masking tape, but removed it after 24 hours for fear it would never cure.
    This may have been a bad thing to do on a monday when I wanted to use the boat on the following saturday. I figured in 5 days it would set up good enough. It has been only 24 hours, but this stuff doesn't seem to be doing much of anything. Its still very wet and panic is setting in.
    Should I remove this stuff now and replace it with a fast cure 5200? Or should i be patient and see what saturday brings. If its not completely cured by the weekend and its gets wet will it be ruined? I can always do the job again, but would it be easier to remove it now while its wet, or when its hardened up some more? Is there a different product I can use that is less prone to running?
    As far as the rub rail goes....I was very surprised to see it just screwed right into the transom. Not to mention the plastic covers over the rear lifting rings. Should these screw holes be filled up with silicone prior to installation? And what about the rub rail itself - I was going to use a silicone a little less permanent like 3M 4200. Is there a better choice?
  • TRO
    Senior Member of PLANETNAUTIQUE
    • Mar 2009
    • 410

    • Houston, TX


    #2
    i'm pretty sure regular 5200 takes 7 days to cure. but when it cures, it is permanent and solid as a rock. if you have less than 7 days for it to cure, you might want to use the fast cure 5200.

    Comment

    • DanielC
      1,000 Post Club Member
      • Nov 2005
      • 2669

      • West Linn OR

      • 1997 Ski Nautique

      #3
      I use BoatLife Life-Caulk.

      You also need to realize that when your 1996 Supersport was designed, and manufactured, nobody thought people would be overloading their boats to make big wakes. The areas on your boat that are leaking around the transom were not designed to be under the surface of the water.

      Comment

      • 93nautique0710
        • Aug 2009
        • 173

        • east tn

        • 1993 ski nautique 196

        #4
        Originally posted by TRO View Post
        i'm pretty sure regular 5200 takes 7 days to cure. but when it cures, it is permanent and solid as a rock. if you have less than 7 days for it to cure, you might want to use the fast cure 5200.
        5200 is great stuff just use the fast cure will be hard enough to use overnight just as strong as the regular and cures under water

        Comment

        • Jono
          • May 2010
          • 85


          • 1996 SuperSport

          #5
          No its too late. I already applied it monday.
          Would saturday be too early to get it wet for a few hours? If not, the only thing I can do is put a good piece of tape on it.

          Comment

          • WakeSlayer
            1,000 Post Club Member
            • Sep 2005
            • 2069

            • Silver Creek, MN

            • 1968 Mustang

            #6
            You will be fine by Saturday. i think you will cause more problems and make a mess trying to re do it. IF you are worried about it, just tape it off as you said.
            the WakeSlayer
            1999 Super Air - Python Powered <-- For Sale
            1968 Correct Craft Mustang

            Comment

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