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Thread: Mould tool

  1. #11
    Site Supporter ProtoTipo's Avatar
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    Re: Mould tool

    'Talking about release agents;
    Can someone recommend a trusted mould release for a small (grp) project?

    Thanks for any help.

  2. #12
    SEC Member gtmpaul's Avatar
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    Re: Mould tool

    meguiars mirror glaze release wax
    There are others but I use this.

  3. #13

    Re: Mould tool

    Chris, seeing your post, i went along to see my Fibre Glass moulder tenant to ask his advice, and he suggested a product, the tin of which I have taken a photo of and will try to attach.

    And whats more, he has given me the tin with a small amount in, which I shall bring to Uncle Phil's on Saturday.
    Attached Thumbnails Attached Thumbnails IMG_2088[1].jpg  
    Last edited by Longtimefan; 03-04-2019 at 17:41.

  4. #14
    SEC Member Strat Fan's Avatar
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    Re: Mould tool

    Are you moulding or releasing from a mould?
    What finish are you after?
    What finish has the pattern/mould got?
    Honey wax or PVA, or both depending on the application.
    "You can lead a horse to water, but a pencil must be lead"
    Stan Laurel

  5. #15
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    Re: Mould tool

    Quote Originally Posted by Strat Fan View Post
    Are you moulding or releasing from a mould?
    What finish are you after?
    What finish has the pattern/mould got?
    Honey wax or PVA, or both depending on the application.
    Thanks Craig, Paul, Robin,
    Craig, It's to make the 'male' side of that press tool (to press thin 0.5mm embossed alloy plate 460mm x 230mm).
    I have already made a 'first effort' which I now know I can perfect.
    In the process of that, I used the remnants of an old 'Back to Black' aerosol, which worked to a degree, but not as good as it could have been.
    Robin, that's kind of you, thanks.

  6. #16
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    Re: Mould tool

    Sounds like a one off use then Chris?
    PVA has never failed for me.
    I'm no expert but I think waxes are more for moulds you are going to use repeatedly, where you can build up a decent thickness of release agent to a high finish.
    PVA has been quite forgiving for me.
    Bear in mind though it's a different PVA than the White glue used for woodwork. Using that might have the opposite effect desired!
    It's blue and sort of smells a bit like french polish.

  7. #17
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    Re: Mould tool

    Quote Originally Posted by john View Post
    Sounds like a one off use then Chris?
    PVA has never failed for me.
    I'm no expert but I think waxes are more for moulds you are going to use repeatedly, where you can build up a decent thickness of release agent to a high finish.
    PVA has been quite forgiving for me.
    Bear in mind though it's a different PVA than the White glue used for woodwork. Using that might have the opposite effect desired!
    It's blue and sort of smells a bit like french polish.
    Thanks John,
    Yes, it's a one off job, and not for the production of any fibreglass parts.

  8. #18
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    Re: Mould tool

    Thanks to John D., Craig and Paul.
    I used Robin's tin of wax and some PVA (is it always blue coloured?).
    Anyhow, it worked, and I've got a much much better grp side of the press tool this time.

    'Will update at the next stage.

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