DIY Silcone Mold for Resin Skulls using SUGRU. I have never used this stuff but have watched a lot of YouTube videos seeing all the cool things it does. You can order it off their website sugru.com and they have a gallery of 100s of hacks and DIY ideas. This tutorial shows how to make a mold suitable to pour resin into. Tutorial for Resin Skulls and Silicone Mold using Sugru at The CSI Project here.