Silicone-to-silicone applications such as making two-part molds or casting silicone into silicone are possible, but require a release agent. This release agent cannot contain a significant amount of silicone oil. Here are some release options:
- Mann Ease Release™ 200 is formulated specifically for releasing silicone rubber from silicone and other surfaces. Applied as a light mist coat, it will not interfere with surface detail.
- A mixture of 2 parts isopropyl alcohol and 1 part dish soap can be used in some cases to release silicone from silicone.
- Petroleum jelly can be used to release silicone from silicone, but it should be thinned with mineral spirits so that it can be applied in a thin layer with minimal visible brush strokes.
Whenever possible, you should consider doing a small-scale test to make sure that the release agent effectively works for your particular silicone combination.