I use the Alumilite Flex-60 stuff and I find it wonderful but too fast setting for anything other than a "squish" mold of two parts. Turrets can be made thin with a little fg tape to provide body, fun stuff but use gloves and keep it warm to provide good cure.
I highly recommend Smooth-on, lots of "how-to" videos and plenty to chose from. Smooth-On, Inc. - Mold Making & Casting Materials Rubber, Plastic, Lifecasting, and More I use the task16, molds are ready in 4-5 hours and have a high shore value (tear strength) Mold Star® 15, 16, 20T and 30 Platinum Silicone Product Information
