Larry/Mike:
Bought some HS3 to make a new mold for making "umbrella" rigs because I've been selling a few to friends and coworkers.... wanted to make a 3 headed version and everything seemed to go well until it came to unboxing my mold. I poured three "dummy" heads using Alumilite regular and dangled them from a wire to make my cavities. After 24 hours, I deboxed my mold and tried to pull the heads out..... and they didn't want to let go. It turns out all three cavities are useless (unless bass like shad with chronic acne) with "pock marks" from where the silicone didn't want to release.
What did I do wrong? I measured carefully and poured all the silicone in one spot to avoid bubbles.... and even let it cure longer. Should I have coated the dummy heads with something? Help!