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Old 03-03-2013, 07:24 PM
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building a fiberglass plug then mold

I have RC drag boat hull made of styrene. I want to pull a plug and then make a mold. what type of foam or other product can I use to fill the hull and cap to pull a plug ?
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Old 03-04-2013, 09:07 AM
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i'd start at fiberglassforums.com
the plug and mold can be made out of anything; wood, plaster of paris, sheetrock mud, sheet foam, can foam
the level of finish on the mold will dictate what finish you'll get on the finished product.

Last edited by ogre; 03-04-2013 at 09:18 AM.
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Old 03-04-2013, 10:45 AM
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If it is sytrene you have a real issue as styrene melts when regular fiberglass products are used on it..I would make a mold from plaster of paris from the existing and then make the new hull from that..

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Old 03-04-2013, 08:05 PM
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If it is sytrene you have a real issue as styrene melts when regular fiberglass products are used on it..I would make a mold from plaster of paris from the existing and then make the new hull from that..

Sam
ok thanks. I know styrene will melt with finishing resin. Thats why I wanted to know what I could pour into the hull to pull a plug. With the plug made then I would start building the mold
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Old 03-08-2013, 09:05 AM
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use epoxy resins, buy a gallon from ebay, it is useful for many things. Wax the outside of the hull,add flanging and then lay up your mold. Search around on you tube lots to see there. been done before, fun and satisfying project.

Last edited by John Se; 03-08-2013 at 09:13 AM.
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Old 03-08-2013, 10:11 AM
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Quote:
Originally Posted by ogre View Post
i'd start at fiberglassforums.com
the plug and mold can be made out of anything; wood, plaster of paris, sheetrock mud, sheet foam, can foam
the level of finish on the mold will dictate what finish you'll get on the finished product.
Hey! Don't forget, Von Dutch used wadded up newspaper and plaster of paris.

BB
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