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mark poulson

Two Piece Mold Question

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I recenty made my first two piece mold, for pouring some soft plastics.

I used PAM to coat the first face, except for the masters, so I could close the mold onto the second half while the mold material was wet, and get a good impression and fit.

That part worked great.

I coated both halves with two coats of water thinned white glue after they'd dried, and then poured some trial baits.

While the baits came out great, the glue on the body of the molds, not in the actual depressions, stuck to itself when I clamped the mold shut to pour.

I just made a new set of mold faces, and I'm wondering if I just put PAM on the mold faces and vent holes, and coat only the actual mold depressions that are getting the plastic with glue, will that work better?

Or do I even need the glue? Will the PAM be enough?

Edited by mark poulson
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You only need to coat the mold depression, not the face of the mold. I coat mine with three coats of 50/50 glue and water. It seals the mold and keeps the baits from getting air bubbles.

There's probably a reason why not to but I've been coating the entire mold because the unsealed surfaces leave POP dust on my hands and baits.

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Mark:

Be sure you are using Elmer's GLUE-ALL. Regular white glue of any other variety may not/will not give you the desired results!

Jim

Jim, I bought some regular white glue from the dollar store just to try it. Worked great at 50/50 mix.

www.novalures.com

Edited by nova
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I remember reading a post about this a while back where someone had the exact same issue. They recommended a longer wait time to allow to totally dry before clamping them together. And if I remember the wait time was long, like 4-5 days. Maybe you are not giving it enough time to fully cure.

You're probably right. I'm not very patient. :D

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