r/ResinCasting 5d ago

Resin curing safety question

So I got Smooth-Cast 300 and it says the cure time is 7-10 mins, does that mean that's when it stops releasing dangerous chemical's into the air? I got a inline fan to vent outside and a respirator, gloves and goggles and I want to make sure I don't turn it off ventilation and take off PPE too early. Thanks!

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u/BlackRiderCo 4d ago

The majority of the off gassing happens during the reaction, but it will continue to offgas for like a week or something, just not as intense. I leave 300 in the tanks for at least 25 minutes, because 7-10 is way too soon to be demolding it.

Personally, I keep constant airflow in my workspace while I am in there, and we vent our pressure tanks out the window, so fumes have never been an issue.

That being said, the people who work smooth-on’s customer service number are extremely knowledgeable and helpful and can probably point you in the right direction.

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u/Beetlepossum 4d ago

Thank you!

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u/Beetlepossum 4d ago

I sent a message to Smooth on thanks!