Fiberglass laminates and secondary bonding

Discussion in 'Fiberglass and Composite Boat Building' started by TimberDoodle, Apr 28, 2009.

  1. TimberDoodle
    Joined: Apr 2009
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    Location: Colorado

    TimberDoodle New Member

    With the secondary bonding of epoxy, can you add additional fiberglass laminates to a lay-up that has cured, been flowcoated, and sanded, or is that just asking for delamination trouble in the future?
     
    TimberDoodle, Apr 28, 2009
    #1
  2. AroMarine
    Joined: Jul 2005
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    Location: Atlantic City NJ

    AroMarine Junior Member

    Secondary bonding on cured epoxy usually needs the removal of the amine blush and some grinding for bite. Usually I grind first then vac and wash with water not solvents. Water cuts the amine. Some resin formulas are suposedly amine free or small amounts and therefore can be relaminated without much prep. This would need to be discussed with resin manufacturer. I am always leary so I do the grinding.
     
    AroMarine, Apr 29, 2009
    #2
  3. Landlubber
    Joined: Jun 2007
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    Location: Brisbane

    Landlubber Senior Member

    " been flowcoated, and sanded"...nup, not really, you are asking for trouble.

    We would not do this in the yard, so I guess that is all I can say.
     
    Landlubber, Apr 29, 2009
    #3

  5. Craig_Hastie
    Joined: Jun 2004
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    Location: Airlie Beach, Australia

    Craig_Hastie Junior Member

    What is the job, inside a cupboard or structural? Is it epoxy flowcoat?
     
    Craig_Hastie, May 7, 2009
    #4
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