fiberglass casting from a 2 part mold

  1. #1

    fiberglass casting from a 2 part mold

    I have experience laying fiberglass in a 2 part silicone mold, but it's always been on a wider/larger object where I can get into the mold once assembled and patch up the seam from the inside. I have a project where I need to create a set of large skinny legs in fiberglass (life size). What is the best way to bond the 2 halves since I have no access to the inside once the 2 halves are assembled?

    thank you

  2. #2
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    Re: fiberglass casting from a 2 part mold

    Slush/Roto cast resin?

  3. #3

    Re: fiberglass casting from a 2 part mold

    KaanE said: View Post
    Slush/Roto cast resin?
    Would you still have the strength along the seam that laying fiber would give you with just resin alone filling in that area?

  4. #4
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    Re: fiberglass casting from a 2 part mold

    Why not doing the whole piece with slush/roto resin? Instead of doing noth halves and then joining them.

  5. #5

    Re: fiberglass casting from a 2 part mold

    KaanE said: View Post
    Why not doing the whole piece with slush/roto resin? Instead of doing noth halves and then joining them.
    My concern is the strength of just resin alone. The legs will be supporting the body and I'm thinking I need fiberglass to make them nice and sturdy.

  6. #6

    Re: fiberglass casting from a 2 part mold

    Slush resin with an expanding foam core might work and give you the strength you need.
    You could even fiberglass the two halves, slush them together and expanding foam the middle.

  7. #7
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    Re: fiberglass casting from a 2 part mold

    You could also add a roll of fiberglass matt and slushcast the piece and then add a foam core to it.

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