Do you know that silicone rubber will PERFECTLY bond to composite mould covered with Frekote 770-NC? I didnt… Never ever had problem with silicone bonding to something, even in worse conditions like high roughness surfaces without any release agent or wax.
I did…
tried to make a casting with aluminum I got some frekote spray on, what a mess.
yes, you need to use special release agent or waxes to get silicone to remove off a mold surface. Thats how you make a reusable silicone bag. was that what you were trying?
2hojo: Yes, I was trying to make a reusable silicone bag. I never had problem with separation from composites even without release agent.
We use Axel 19SAM and nothing sticks to it including silicone. I can not recommend it enough. And it can be used without a sealer so it saves money and time.
i use liquid wax , which is also used as a priming wax for pva. i apply it to the silicone mold and then layup using epoxy.