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Is Hei-Cast 8400 toxic?
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dentveran:
Hello,
I bought this silicone material to make a silicone part that goes into a person's mouth. I couldn't find any information regarding toxicity.
Any idea if it's safe to use in a person's mouth?
Thanks
Borek:
You need to ask the manufacturer.
DrCMS:
Hei-Cast 8400 is not a silicone it is a three component polyurethane for vacuum casting/molding.
One of those components is an isocyanate and that is likely to be toxic.
One of the other components is a polyol which is harmless.
The third component is probably a plastisier as adding more of it reduces the hardness of the finished article. Some plastisiers can be a health issue.
I would not put a product made by you using this in my mouth.
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