FuseFX Royal Jel-E
Royal JeL-E is an excellent water based mold release developed especially for casting silicone into silicone.
This unique solution is applied by lightly brushing Royal JeL-E into your silicone mold, creating a film over the entire surface. Use a hairdryer to speed-up the drying process. After demolding Royal JeL-E rinses off clean with warm water leaving your cured silicone piece clean of contaminants and residue.
It's also great for floating clay sculptures off plaster lifecasts! Apply 2 coats, drying between each, before sculpting. When ready, soak the lifecast in warm water for a few hours till the Royal Jel-E softens, then float the sculpture off.
Use Vinyl or Nitrile gloves when working with Royal JeL-E.