Here's some info: http://paleo.cc/casting/silsum.htm and another: http://www.themonsterlab.com/vance-matrixmold.html and this: http://www.duke.edu/~mtb3/castingmanual/chapter_2.html and yet another: http://www.conceptart.org/forums/showthread.php?t=47324&highlight=mold also google-"Silicone...