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Thread: Advice on mold release for a restructured part?

  1. #1
    Senior Member
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    Jun 2003
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    Advice on mold release for a restructured part?

    I have a part I need to replicate out of mostly fiberglass and bondo. The part is perfect, front side and back side. How would you folks make a mold from this part I have. It fits like a glove where it is, but too heavy. Should I paint the part first? Do I need steel reinforcements in the mold if I am replicating this 1 time? I guess just after what you use to release from a part that is mostly filler, not gel. Eric

  2. #2
    Senior Member murcie-me's Avatar
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    Re: Advice on mold release for a restructured part?

    I would make shure the part is exactly what you want, and is sanded smooth, and free of imperfections that would not want to be copied by the mould. I definately would paint the piece, just use some good KRYLON gloss paint (remember, 2 light coats is better than 1 heavy coat!). When completely dry, get some automotive paste wax, and apply a few coats to the painted piece. Go to HOME DEPOT and get a can of TOP COAT, or silicone spray. TOP COAT is a spray that you use to spray on table saws, chop saws, etc, to protect them from moisture when stored. Anyway, spray the piece with either, let dry, and its ready to mould ( you can also use PAM aerosol non stick cooking spray). No reinforcements should be necessary, but it depends on the size of the piece, and how many layers of glass you are going to apply.
    Without talent experience is worthless

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