What material can I pour into a 1" x 1" x 1" mold (a cube without a lid) that will solidify into a rubber-type consistency? I need to make a part for a microphone that has not been manufactured in 50 years. It would be best if the material did not harden like acrylic. However, I'd use that as a last resort if I knew where to get it.
I've never done this sort of thing, so I have no idea what material to try to find or where to search for it. Since I only need a small amount, a suggestion for a material that is only available from a wholesale-only industrial supply house would be hard to follow.
Is there some sort of silicone that meets this requirement? Is there such a thing as liquid rubber? Here's hoping!