I am working on a project where I'd like to suspend several objects in a 12" x 12" x 12" clear rubber cube. This is meant to be an art object, so longterm durability is important.
In researching casting rubber options, it seems like a lot of the nicer more durable options are meant for smaller volumes, and are cost prohibitive at this scale. Meanwhile the more affordable options mention that they'll decay over time.
Here are a couple I've been looking at that seem representative of the options:
Urethane casting rubber, durable but expensive: https://www.smooth-on.com/products/clear-flex-30/
Latex, cheap but will decay: https://douglasandsturgess.com/products/latex-10-clear-5-gal
Is there another option I could look into, or some way of combining these materials?
I thought of maybe making a 10"x10"x10" latex cube and then surrounding the outside with urethane. Would that be viable and prevent decay over time? Or is there another material I can check out?