Not sure if this might be the problem but I have seen people here complain about the same thing with LC molds they sell. Don't know if the silicone molds they sell is the same material as the silicone they sell for making molds. Might be some kind of additive in the silicone. I have made many molds from tin and platinum cure silicone without degassing and never had that problem. I have used M&F, smooth on mold star, and Raw Materials brand silicones.