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General Material Questions
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General Material Questions

Suggested knowledgebase articles:

Which product should I use for my project?

Start with these three questions. This is the fastest route when you don't yet know what type of product you need: A mold or a casting? They are opposites. A mold is the negative: the cavity that cap...

How much does the foam expand, and how do I control density?

Expanding foams (FlexFoam-iT and similar) grow well beyond their liquid volume, the multiplier depends on the specific product and is on its TDS. Key points: Free-rise vs. constrained: in an open pou...

My clear resin came out yellow / cloudy / full of bubbles. How do I get water-clear results?

Clear casting is the least forgiving job, with these three different defects, there are three different causes: Cloudiness → usually moisture or incomplete mixing. Keep everything dry (clear urethan...