Gluing fibre glass and Carbon Fibre

Discussion in 'Fiberglass and Composite Boat Building' started by shakey78, Mar 12, 2010.

  1. shakey78
    Joined: Sep 2009
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    Location: Australia

    shakey78 Junior Member

    Just a few questions, if I was to glue hull to the top half (cabin) like a two part molded boat what glue would you use for that application for both carbon fibre and fibre glass
     
  2. Herman
    Joined: Oct 2004
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    Location: The Netherlands

    Herman Senior Member

    Either epoxy glue paste (whether or not rubber-toughened) or methacylate glue.

    Depending on the situation, one can fillet and laminate the inner and possibly also the outer corners. But that is a bit hard to determine without more info (as in a drawing or photo)

    I do not recommend any material, as I have no idea what is available locally. Over here I would recommend either Plexus (MA glue) or Sicomin epoxy glue and resins, or Hexion epoxy glue and resins.
     
  3. shakey78
    Joined: Sep 2009
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    Location: Australia

    shakey78 Junior Member

    I wish to glue top and bottom together, like they do with jetskis I've seen it
    done on the how it's made TV show, I would like to have a strong joint
     
  4. Herman
    Joined: Oct 2004
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    Location: The Netherlands

    Herman Senior Member

    Any photo or sketch?
     
  5. shakey78
    Joined: Sep 2009
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    Location: Australia

    shakey78 Junior Member

    http://www.youtube.com/watch?v=aoXnl2BIa3k

    This is what Im trying to do as Im making a small scale model of the boat first
    so I wont be able to get to the join on the inside so gluing it would be easyer option just wanted to no the best glue
     
  6. CutOnce

    CutOnce Previous Member

    The "How it is Made" TV show is a Canadian production out of Quebec if we are talking about the same one. They did a segment on SeaDoo watercraft made by Bombardier in Quebec. The adhesive they use is Plexus MA.

    Plexus joints are very strong - surface prep is important, and you should read the Material Data and Safety sheets available where ever the product is (legitimately) sold. You should wear proper gloves that provide a chemical barrier while working as well as it never hurts to use a respirator.

    --
    CutOnce
     

  7. PAR
    Joined: Nov 2003
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    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Plexus is a fairly complex adhesive system and a two part methacrylate usually. It's important to use the right "Plexus" product (there are several). These fall into several categories, but they are either 1:1 or 10:1 mix ratios. They're priced about like the high end urethanes, usually higher then epoxy and tough adhesives, though epoxy formulations can easy exceed the usual offering from these reactive acrylates.

    It's not necessary to have this type of joint on your boat. Mechanical fastening of a bedded joint will do as well and likely cost a lot less too.

    In your application the least costly but permanently adhered method would be a polyester grout, with maybe some fasteners. Next would be a vinylester grout, or you could use an epoxy bond, which would likely have better physical properties the the Plexus.

    Lastly, cabins occasionally have to be removed for repairs. In this vain most designs have the cabin molded into a cap or if not possible, a raised flange or landing area for the cabin to sit on, so water can't get under the joint, but it still can be separated for repairs, over the road transportation, etc. In this regard most are mechanically fastened over bedding compound with often is polyurethane.
     
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