Kevlar Canoe Restoration

Discussion in 'Boatbuilding' started by Joe Gerard, Apr 12, 2021.

  1. Joe Gerard
    Joined: Apr 2021
    Posts: 6
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    Location: MN

    Joe Gerard Junior Member

    Hello,
    I just picked up a 1984 Kevlar Aramid 49 canoe. It has been stored outside, uncovered for decades. It needs a new coat of resin and while I'm at it, I might as well add a new layer of fabric to help solidify it a bit. Does anybody recommend that I add a layer of fiberglass or kevlar or something to the whole boat to strengthen the hull, it may be brittle? And type of fabric I should get?
    I just joined the forum and have been trying to figure out the search features but haven't found a direct comparison project yet. So if this has been covered somewhere, just point me to that. Thanks.
     
  2. Blueknarr
    Joined: Aug 2017
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    Location: Colorado

    Blueknarr Senior Member

    Welcome

    As with the old saying
    Pictures are worth many words.

    Both kevlar and epoxy are very susceptible to UV degradion.

    Decades of exposure may have been too many

    Remove any and all varnish before adding glass.

    Kevlar is hard to laminate well, but is the most appropriate cloth to use.

    Use epoxy and no polyester!

    Good luck
     
  3. Joe Gerard
    Joined: Apr 2021
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    Location: MN

    Joe Gerard Junior Member

    Thank you
     
  4. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    Why do you think it needs a coat of resin? The resin is infused into the fabric and adding resin on top will not improve anything. If it has been in the sum for years and the resin is degraded, it is not worth repairing. Probably using it as a mold would be the best option if you really like the shape.
     
  5. Joe Gerard
    Joined: Apr 2021
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    Location: MN

    Joe Gerard Junior Member

    Well, a new Kevlar canoe is smooth and glossy. This canoe looks like it is just plain Kevlar. Like the glossy resin has disappeared. It has the texture of hardened Kevlar cloth, not a smooth surface.
     
  6. BlueBell
    Joined: May 2017
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    Location: Victoria BC Canada

    BlueBell "Whatever..."

    Scroll down to the bottom of this page.
    Lots of links (look at the bottom of those pages too for more links!)
     
  7. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    It depends on how it was built. Resin does not disappear. It will fade and yellow with age though.
     
  8. BlueBell
    Joined: May 2017
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    Location: Victoria BC Canada

    BlueBell "Whatever..."

    Joe,

    Does your phone have a camera?

    BB
     
  9. Joe Gerard
    Joined: Apr 2021
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    Location: MN

    Joe Gerard Junior Member

    Ok
     

    Attached Files:

  10. Joe Gerard
    Joined: Apr 2021
    Posts: 6
    Likes: 0, Points: 1
    Location: MN

    Joe Gerard Junior Member

    Ok
     

    Attached Files:

  11. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    That does not look like Kevlar. It would be yellow otherwise. The laminate was laid dry and that is what caused the pores and rough surface. Was that canoe ever in the water?
     

  12. Joe Gerard
    Joined: Apr 2021
    Posts: 6
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    Location: MN

    Joe Gerard Junior Member

    Wenonah Canoe, it is Kevlar.
     

    Attached Files:

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