plexiglass and vinyl esters fiberglass

Discussion in 'Fiberglass and Composite Boat Building' started by markstrimaran, Jan 30, 2015.

  1. markstrimaran
    Joined: Dec 2014
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    Likes: 6, Points: 28, Legacy Rep: 28
    Location: usa

    markstrimaran Senior Member

    Hi.thinking of using polycarbonate sheet for a shell to fiberglass over. I can't find much on the internet. Looking for a good bond. The plexiglass will not be removed.
    The item will be the inside of dagger board cassette.
    My concern is the plexiglass will soften and not bond. Any help is appreciated.
    Thanks
     
  2. PAR
    Joined: Nov 2003
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    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Why would you use this material to bond over? Why would you want Lexan inside the centerboard case? As a core, I can't think of much worse, lousy bonding, incompatible modulus spec's and expansion rates, etc. Typically cyanoacrylate is the cheap (relative term) for polycarb or you can use one of the modified acrylates marketed as specifically for these materials, like Plexus.
     
  3. markstrimaran
    Joined: Dec 2014
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    Location: usa

    markstrimaran Senior Member

    Wrap and heat bend plexiglass to dagger board.
     
  4. Canracer
    Joined: Aug 2009
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    Location: Florida

    Canracer Senior Member

    You could try it but you'd be investing time and effort without really knowing if it will work (or how long it will last.)

    Maybe you could wrap the board with thin plastic cling wrap and then glass over that.
     
  5. markstrimaran
    Joined: Dec 2014
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    Location: usa

    markstrimaran Senior Member

    The dagger boards are tapered top and bottom. Need a rigid form. My only concern is if the plexiglass will solvent warp.
     
  6. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    You can use Formica over the board. It is rigid enough and with de-molding wax there will be no adhesion.
     

  7. Canracer
    Joined: Aug 2009
    Posts: 621
    Likes: 9, Points: 18, Legacy Rep: 47
    Location: Florida

    Canracer Senior Member

    You could leave an edge of the fiberglass with a split so that you could pull it off the board. You might also wrap the board and then cut the cassette off. It can always be repaired when you put it in the boat.
     
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