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Old 02-11-2012, 11:12 PM   #1 (permalink)
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Default Mold Options?

Based on doing quite a bit of reading, seems like there are basically 3 options for making your own molds, unless you have a CNC machine:
POP
Fiberglass Resin
RTV

What are the advantages/disadvantages to each of these?
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Old 02-11-2012, 11:28 PM   #2 (permalink)
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Default Re: Mold Options?

It seems RTV makes the smoothest mold as long as you are sure to not get any air bubbles in it. Pop and fiberglass are the most economical.

I have some RTVs that i have had since the early 90s.

Ive yet to make any of my own molds. I did buy an RTV kit from LureCraft.com though Hoping to finish my prototype one day and make the mold.
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Old 02-12-2012, 08:14 AM   #3 (permalink)
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Default Re: Mold Options?

I've made a couple of silicone molds. They are ok but not really good. I use the Bondo resin to make my molds. I have a lot more experience with it.
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Old 02-12-2012, 12:02 PM   #4 (permalink)
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Default Re: Mold Options?

Quote:
Originally Posted by Jig Man
I've made a couple of silicone molds. They are ok but not really good. I use the Bondo resin to make my molds. I have a lot more experience with it.
It seems that you need to some finishing & sealing work on POP molds, are the Bondo resin molds pretty much good to go when you clean up top edges? No sealing or anything? Baits come out shiny?
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Old 02-12-2012, 02:37 PM   #5 (permalink)
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Default Re: Mold Options?

Yes. Glue the baits down in a container, spray everything with cooking oil, mix up and pour on the Bondo, go away for several hours. Wala you have a mold.

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Old 02-12-2012, 11:04 PM   #6 (permalink)
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Default Re: Mold Options?

POP mold do need drying and sealing. RTV is more expensive then resin. The resin comes out smooth and clean if you glue the masters down good for a decent price. You can also hit the master with a quick coat of wd40 for easy release. Resin molds hold up better then POP. I lean to the resin molds over a POP mold now for making your own mold.
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Old 02-14-2012, 02:43 PM   #7 (permalink)
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Default Re: Mold Options?

what is off gas odor like on the resin? Something that can be done in basement and not stink up house or should it be done in garage?
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Old 02-14-2012, 05:09 PM   #8 (permalink)
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