Non-audio DIY

I’m building a prototype for a non-audio project. There is a junction between male and female connectors that will disconnect frequently. The female connector is now built and shaped like a hollow 4 leaf clover - 1/4” diameter, 1/8” depth. I would like to use this female as a mold to create a male impression using a media such as a slow-curing epoxy. Two questions: Any suggestions as to what kind of epoxy? And what kind of oil or such to put on the female mold so that the epoxy doesn’t stick to it? Thx!
I can't tell what epoxy to use, but I've used synthetic wax on molds as a release agent for composite layups. Apply it just as you would to a car.