I got out an old tube of silicone kitchen & bath caulk. It was completely hardened in the tube & out of curiosity I cut the tube apart. It is interesting stuff: it is quite solid (i.e., holds together) & about as hard as an eraser. It made me wonder if it could be used as a molding compound. It didn't show any effect from molten zinc. But my guess is that curing time would be excessive. Does anybody know if this silicone can be used for molding? Is there a way to speed up curing (additive or heat)?.
Thanks, Bob