First time play with silicone paste. It doesn't flow as two-part liquid RTV modeling silicone, but less expensive. I didn't prepare enough amount of silicone at first, so there were wrinkles at the connection parts. Not clear on the picture, but they were there.
I've learned some tricks for silicone paste from this failure, and all the materials will be reused in the next casting. Here is the prepared base for next mold.