Filler for boat bottom

Discussion in 'Fiberglass and Composite Boat Building' started by Tungsten, Mar 4, 2013.

  1. Tungsten
    Joined: Nov 2011
    Posts: 483
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    Location: Canada

    Tungsten Senior Member

    My boat has a peelply surface left from vac bagging down some thick triax glass with epoxy.I'd like to level it a bit before i paint,I have some west 404 a high density filler.Could i roll a few thin coats of this to give me some toughness against rocks?I'm not looking to sand and fair it.I have other fillers also but thought the 404 would work.
    thanks.
     
  2. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    Yes, it will work fine. You can thicken the resin with it so it fills the texture of the fabric. Don't make it too thick or the roller will make a steepled rough finish. It is enough to add thickener until the resin is milky looking.
     
  3. michael pierzga
    Joined: Dec 2008
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    Location: spain

    michael pierzga Senior Member

    An effective filler is Aluminium powder. West sells it as 420 filler.

    http://www.wessex-resins.com/westsystem/420-aluminium-powder.html

    Aluminum increases the hardness of epoxy, ultra violet resistance ,abrasion resistance and also increases water barrier effectiveness.

    Barrier coat..west 422... would be another good choice. I believe it also has an aluminum powder component... plus some top secret stuff......

    Both are Gray colour
     
  4. Tungsten
    Joined: Nov 2011
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    Location: Canada

    Tungsten Senior Member

    Great stuff thanks.
     

  5. pauloman
    Joined: Jun 2010
    Posts: 268
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    Location: New Hampshire

    pauloman Epoxy Vendor

    you can mix a little bit of fine sand into the epoxy for an abrasion resistant 'filler' - a common trick in the NW where small boats get dragged up onto gravel sandbars
     
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