Fiberglass Help

Discussion in 'Fiberglass and Composite Boat Building' started by Tbatson71, Dec 21, 2017.

  1. Tbatson71
    Joined: Dec 2017
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    Location: North Carolina

    Tbatson71 New Member

    So I have this seam that goes around my transom that I need to fill and finish.Can I fill with thicken epoxy and smooth flush or fill and use a type of mat or cloth to finish.Any help would be appreciated.
     

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  2. Canracer
    Joined: Aug 2009
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    Location: Florida

    Canracer Senior Member

    So what happened to your transom?
     
  3. Tbatson71
    Joined: Dec 2017
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    Location: North Carolina

    Tbatson71 New Member

    Replacement of rot in wood
     
  4. ondarvr
    Joined: Dec 2005
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    Location: Monroe WA

    ondarvr Senior Member

    You need to glass it back in.
     
  5. Tbatson71
    Joined: Dec 2017
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    Location: North Carolina

    Tbatson71 New Member

    Thanks for the reply.New to fiberglass work not sure of the method
     
  6. PAR
    Joined: Nov 2003
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    Location: Eustis, FL

    PAR Yacht Designer/Builder

    There's several previous threads on this site that cover the basics of this, but judging by your photo, the first thing you need to do is widen that seam a lot more. The usual advice is a 12:1 taper from the old to new work, so you have sufficient bond surface to marry the two. This means if the 'glass is 1/4" thick, you'll need 3" of taper on each side of the line, more if it's thicker. An angle grinder does a good job of this, particularly if fitted with a diamond blade. Once tapered in both directions, you'll apply enough fabric to bulk it back up to just below flush of the surface. Typically you'd like to see a combo fabric (1208, 1708, etc.) employed to get the most strength across the seam. Lastly the very shallow depression is filled with fairing compound and smoothed to satisfaction.
     
    fallguy likes this.
  7. Tbatson71
    Joined: Dec 2017
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    Location: North Carolina

    Tbatson71 New Member

    Excellent info. That's exactly what I was looking for. Thank you.
     

  8. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 476, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

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