looking for a fileting material in a pinch.

Discussion in 'Boatbuilding' started by midcap, Nov 7, 2013.

  1. midcap
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    midcap Junior Member

    Could I use the bondo hair for fileting?
     
  2. AnthonyW
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    AnthonyW Senior Member

    Don't know about that - but I used cake flour - worked very well. Much easier than silica to sand and use (and fine sawdust is hard to get in my part of the world.)
     
  3. midcap
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    midcap Junior Member

    hmm, I never thought about that.
     
  4. michael pierzga
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    michael pierzga Senior Member

    Wood dust.......clean out your vacume dust extractor
     
  5. midcap
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    midcap Junior Member

    I'm trying to get something that is already mixed together though.
     
  6. michael pierzga
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    michael pierzga Senior Member

    Hmmmmmm

    Bondo is pretty crappy fillet material. Guess its better than bubble gum.

    Go for the fiber bondo.....precoat the substrate with resin first.

    Dont sail around the world with it.


    Hmmmm
     
  7. midcap
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    midcap Junior Member

    I just noticed that I have some micro baloons on hand. That should work good.
     
  8. hoytedow
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    hoytedow Wood Butcher

    I save the dust from my sander in plastic jars.
     
  9. michael pierzga
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    michael pierzga Senior Member

    Oh.....so you do have resin you just need filler...fibers are stronger than ballons
     
  10. midcap
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    midcap Junior Member

    yep I have 10 gallons on hand. I don't think I would be able to get the fibers by tomorrow though. I just need the balloons to make a radius for me so the roven lays down better in the corner.
     
  11. michael pierzga
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    michael pierzga Senior Member

    Guess ya gotta do what ya gotta do.
     
  12. Milehog
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    Milehog Clever Quip

    Some use talc.
     
  13. upchurchmr
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    upchurchmr Senior Member

    Don't use saw dust, too coarse and it just balls up and won't smooth out.
    Sanding dust is perfect.
    Microballons are almost as good, a little sanding dust mixed in will provide a little desirable strength.

    Don't stop
     
  14. PAR
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    PAR Yacht Designer/Builder

    It depends on what the fillet is. There are three primary fillet types, cosmetic, light and heavy structural. A cosmetic fillet is just as it sounds and doesn't need to have much more than the ability to hold it's shape when cured. These are used to clean up inside corners on a cockpit sole for easy washout (for example).

    A light structural fillet might or might not have a fabric over it, but it will be made of a structural filler material(s), such as silica, milled fibers, wood flour, cotton flock, etc. The filler materials often has something to do, such as increase bonding, compressive or tensile strength, etc. For example milled fibers is much preferred when bonding to 'glass.

    A heavy structural fillet is always covered with fabric, usually biax, though if the boat's small, regular cloth can be used. The filler materials are about the same as a light structural fillet, with emphases fibrous materials that have strength, stiffness and substrate bond effectiveness.

    Baby powder is an effective filler to help smooth out a fillet and makes sanding easier, but offer not real strength. corn, wheat or rice flour (yep, steal it out of her kitchen) is a good medium strength filler. Balloons and micro spheres have not strength, but do ease sanding effort and weight.
     

  15. midcap
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    midcap Junior Member

    don't stop?
     
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