How can I make a rubber stopper at home? tia sal

Discussion in 'Misc Electronics' started by Guest, Jul 7, 2005.

  1. Guest

    Guest Guest

    Greetings all,

    I would like to make my own rubber stoppers I have created a mold using plaster of paris,
    I have tried epoxy and fiberglass resin but these end up being to hard does anyone know
    what I can use to make softer rubber stoppers.

    TIA SAL
    Guest, Jul 7, 2005
    #1
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  2. wrote:
    >
    > Greetings all,
    >
    > I would like to make my own rubber stoppers I have created a mold using plaster of paris,
    > I have tried epoxy and fiberglass resin but these end up being to hard does anyone know
    > what I can use to make softer rubber stoppers.


    You could try RTV (Room Temperature Vulcanizing) silicone rubber,
    but it'll get expensive pretty quick, and you'd probably have to
    build them up in layers due to the shrinkage issue.

    Why don't you just buy them? Odd-sized glassware?


    Mark L. Fergerson
    Mark Fergerson, Jul 7, 2005
    #2
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  3. Guest

    felix Guest

    Hi
    If you want to duplicate an odd sized version of the standard rubber
    stopper, I will guess that you cannot do it.

    The rubber they use in these is resistant to many chemicals including
    gasoline and acids, it ignores reasonably high temperatures, and does not
    deteriorate, crack or harden with age. And best of all, the rubber
    formulation they use has the right compression to make a reliable seal
    without leaking,even when re-used many times.

    Any commonly available material, including RTV , will not meet the above
    criteria.


    Of course, they probably aren't really rubber, but some concoction descended
    from a barrel of Arab oil....

    Felix

    <> wrote in message
    news:Da8ze.36947$...
    > Greetings all,
    >
    > I would like to make my own rubber stoppers I have created a mold using
    > plaster of paris,
    > I have tried epoxy and fiberglass resin but these end up being to hard
    > does anyone know
    > what I can use to make softer rubber stoppers.
    >
    > TIA SAL
    >
    >
    felix, Jul 7, 2005
    #3
  4. Guest

    Clint Sharp Guest

    In message <Y%eze.28992$ro.16352@fed1read02>, Mark Fergerson
    <> writes
    > wrote:
    >> Greetings all,
    >> I would like to make my own rubber stoppers I have created a mold
    >>using plaster of paris,
    >> I have tried epoxy and fiberglass resin but these end up being to
    >>hard does anyone know
    >> what I can use to make softer rubber stoppers.

    You could try and find a Dow Corning office, they sent me some 'samples'
    (half a litre of each) of two, two part pourable 'rubber' compounds for
    potting some temperature stabilised optical sensors I designed. The
    stuff I got was probably too soft when cured for what you need but they
    do have a wide range of compounds, speak to a tech rep and they'll be
    able make suggestions if you explain what you need.

    --
    Clint Sharp
    Clint Sharp, Jul 7, 2005
    #4
  5. Guest

    Noah Little Guest

    John Fields wrote:

    > Google for "cast urethane" without the quotes


    Probably better with the quotes; that way, Google will look for that
    phrase. Otherwise, it will return all pages that contain the words
    "urethane" and "cast" regardless of proximity (although their search
    algorithn does appear to bring pages with the words in proximity to the
    front).
    --
    Noah the searcher
    Noah Little, Jul 7, 2005
    #5
  6. Guest

    JANA Guest

    I think you are going to a lot of trouble for something that can be bought
    for a few dollars!

    --

    JANA
    _____


    <> wrote in message
    news:Da8ze.36947$...
    Greetings all,

    I would like to make my own rubber stoppers I have created a mold using
    plaster of paris,
    I have tried epoxy and fiberglass resin but these end up being to hard does
    anyone know
    what I can use to make softer rubber stoppers.

    TIA SAL
    JANA, Jul 9, 2005
    #6
  7. Guest

    Al Guest

    In article <>, "JANA" <>
    wrote:

    > I think you are going to a lot of trouble for something that can be bought
    > for a few dollars!


    Lookup latex rubber molding compound on Google. Lottsa hits.

    Al
    Al, Jul 9, 2005
    #7
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