ultra-cal to ultra cal..release agent for silicone

Hey guys! I am no stranger to SPFX make-up however, I am new to silicone. I have made impressions and sculptures before using vaseline as a release agent to allow plaster to seperate from plaster when making latex facial partials. Problem with that, is that petrolium based products will affect the results of working with silicone. What can I use as a silicone compatible release agent that will NOT affect silicone that will allow the ultra-cal 30 negative to come off the ultra-cal 30 positive? I know th e plaster will release from the clay no problem...but when I pour the negative, I WILL have plaster to plaster contact. I have already sealed the positive with krylon clearcoat.

I use a product called sonite wax for all of my ultra cal molds with silicone or latex, then I use a mist of release 200 from smooth on. You can go to smooth on and they have several release agents to choose from. Silicone only really sticks to silicone, So u don't have to use a tone of release on ultra cal.