>>11371668>Because I'm a cheap bastardYet you invested in a vacuum pump and chamber? Come on now.
Seriously though, vacuum chamber is designed for regular silicone's curing time, so trying to de-gas your microwaveable silicone in it is only going to end in frustration. I used to use some quick-cure silicone myself, but when I finally got a vacuum pump I switched to regular because of that.
BTW, urethane resin produces quite a bit of heat when it cures, so it would be pretty funny if it melts your mold in the process.