This video will teach you how to create a mold with a high performance surface material and a machinable, low cost backup, which in this case is Hapco’s Fill-Its/Haprez combo. The reason for creating a mold like this is to cut down on the thickness of the Hapflex 668, a high performance material, which can be expensive. This method also reduces the amount of shrinkage that would normally occur as a result of casting large quantities of liquid plastic around an odd shaped pattern.

If you would like to download a printable version of this tutorial, click here.

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