Resin Addict Forum

Can someone help me to understand uses for gel coat vs silicone mold, I know silicon is more flexible and I can use a fiberglass jacket to keep its form. i have a piece that I want to cast but I'm not sure if I want to do it on gel coat with fiberglass or with silicone with a fiberglass jacket, I have experience creating gel coat molds but i'm not sure if silicon mold might be a better choice I'm also concern about silicone mold might not last as long as a gel coat mold.

thanks