What is the optimal ratio

Discussion in 'Fiberglass and Composite Boat Building' started by Skua, Oct 11, 2014.

  1. Skua
    Joined: Apr 2013
    Posts: 147
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    Location: Hunt's Pier WW NJ

    Skua Senior Member

    of glass to resin/epoxy? I did some laminating on a stringer using the 50/50 ratio by weight, and although I have no indication that there is a problem, the fibers on the glass surface are fairly noticable. Now the glass on horizontal surfaces is smooth and shiny I know that's not optimal either. This was done before I got a feel for the amounts and spreadability.

    I am wetting out 3620 biax , 2 layers, (required to bring repair up to same thickness as original), using a pan, chipbrush and roller to spread out the epoxy.
     
  2. PAR
    Joined: Nov 2003
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    Location: Eustis, FL

    PAR Yacht Designer/Builder

    If you're getting 50/50 resin/fiber ratio, particularly on this thick a hand laminate, you're right there. You can improve the fiber ratio with bagging or other methods, but 50/50 by hand is about what you can get.
     
  3. Skua
    Joined: Apr 2013
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    Location: Hunt's Pier WW NJ

    Skua Senior Member

    Is there a way to tell if it's resin starved? Other than it falls off?
     
  4. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    Yes, it will be whitish and have bubbles instead of clear and translucent.
     

  5. Skua
    Joined: Apr 2013
    Posts: 147
    Likes: 5, Points: 18, Legacy Rep: 73
    Location: Hunt's Pier WW NJ

    Skua Senior Member

    Then I'm good to go, as I made sure that the glass was wet all the way through.
     
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