Making a mold of a wood positive??

  1. #1
    drokkul's Avatar
    Member Since
    Mar 2006
    From
    Richmond, KY
    Posts
    987

    Making a mold of a wood positive??

    If I'm using wood for my master would a layer (or two) of primer be enough of a sealant to use RTV Silicone and not have it stick into the "pourous" surface of the wood?

    Don't get me wrong... the wood is gonna be pretty smooth anyway, but I believe I've read that wood is hard to mold without it wanting to stick to the mold material.

    If those in the know could reply to this I would be very grateful!!!!

  2. #2

    Re: Making a mold of a wood positive??

    what about painting the wood with a very, very light coat of epoxy resin? even just wipe it down with it?

  3. #3
    CombatBaby's Avatar
    Member Since
    Jul 2005
    From
    The miserable mill
    Posts
    2,325

    Re: Making a mold of a wood positive??

    couldn't you just spray it with release agent?

    -=QuinN!

  4. #4
    yanvaq's Avatar
    Member Since
    Jan 2006
    From
    Bay Area California
    Posts
    21

    Re: Making a mold of a wood positive??

    I just did this with a Klingon disruptor . What you want to do is coat your wood sculpt with sanding sealer . then the silicon can't get in to the grain of the wood to make it stick or pick up the grain to show in your cast later.

  5. #5

    Member Since
    Jul 2006
    From
    O'Fallon, Illinois the STL
    Posts
    579

    Re: Making a mold of a wood positive??

    CombatBaby said:
    couldn't you just spray it with release agent?

    -=QuinN!
    That's what I would try.

  6. #6

    Re: Making a mold of a wood positive??

    Polyurethane. You can get it in a spray can at walmart/lowes/home depot.

  7. #7
    patiam69's Avatar
    Member Since
    Dec 2003
    From
    Sacramento, CA
    Posts
    424

    Re: Making a mold of a wood positive??

    spray it with some clear lacquer and sand it smooth. i know a guy that makes custom fishing works and he carves them out of dowl then seals them with lacquer then molds them with silicone

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