Found this while searching Youtube.

Homemade Reusable Molding Material - https://www.youtube.com/watch?v=u3lLyDnWUxE

Has anyone tried making molding material like this? The video states you can re-heat it to use it again. Silicone and rubber is expensive and one-time use only, so seems like a bit of a waste when I'm not using it for detailed castings and just need a quick mold and cast made which I'll just be sculpting on top of anyway. And this seems to be made of materials I can tolerate working with, so seems like an added bonus.