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my project? Answered

I planned on making some small geometric rocks out of resin. some have undercuts but they are less the a 16th of an inch. would i want to do a two-part molf or will a block mold work?

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Paige RussellBest Answer (author)2017-04-06

Hi IronGrizzly496,

If you use a flexible silicone rubber to make your mold (like Smooth-On's OOMOO 25), a block mold should easily handle undercuts of that size.

Happy making!
Paige

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