Release From Bondo Mold

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After a lot of study here I made a Bondo mold for a large pyramid sinker. Before I use it was just wondering if there is any prep to do to it to aide in the relase of the sinker after it is poured.



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I have had some success by putting Bondo in a rectangular frame, smoothing it and covering with saran wrap. Place the master for the mold half way in then cover with another sheet of saran wrap then a second frame which is then filled with bondo.


After bondo is cured, simply separate the 2 halves and you have a rectangular mold ready for cutting your sprue.


Never have a problem with castings being released.

Edited by Kdog

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