... should be less than 3—5 mins ,otherwise, once the silicone rubber has cross-link reaction during vacuumizing, it will ... after which it will be molded ,then spray the release agent. Normally, the release agent can be Vaseline , detergent. liquid ... different material. The second reason is that the operator pour the silicone into the mold when the mixture is mixed evenly, then the finish silicone mold ...