[Buddahaid]

Originally Posted by Sailor Steve

The silicone itself is white. The color comes from the catylist. The catylist that came with this kit is tan. The second batch I did is more of an off-white. Still cured the same, and in about 12 hours. The short cure time is probably due to the fact that the box is only 1" x 1/2" x 1/2".

I know that I've just never seen that color in twenty years. You might try a dry film mold release agent to help tease the bubbles out of the stacks, or make the stacks longer next time. People usually create vent passages to allow the air to escape at trouble spots, but those are mostly two part molds. It's also advisable to wet down the mold with silicone lubricant for storage. The rubber will last much longer.

Also Lego blocks make excellent reusable mold boxes.

Here's an interesting one piece mold vac assist method.
http://s228.photobucket.com/user/DSt...03151.mp4.html

The part that was molded above.