I found this:
https://www.amazon.com/dp/B074XFLBXWIt is a putty-like material that hardens into rubber.
There are videos on YouTube that shows its use, but they appear to all be advertisements from the manufacturer.
Has anyone had firsthand experience with this product? It it easy to work with? Will it hold detailed shapes? Can it be cut, carved, or sanded after it hardens? What does it stick to, and what does it not stick to?
Thank you for any advice you can offer.