- Silicone RTV mold making rubber may soak into a porous surface like wood or plaster. To prevent sticking, first seal the part with a sealant appropriate to the material.
- Generally, silicone RTV mold making rubber does not stick to anything, and nothing will stick to it. The exception is that it will stick to itself, other silicones, silica, and glass. Mold release will prolong the life of your mold by reducing the wear on the mold by making it easier to remove your cast piece.
Cleaning Your Silicone Mold:
- Wash your cured silicone mold with warm/hot water and mild liquid dish soap.
- Pat dry thoroughly and then let the mold air-dry fully.
- Never use any type of abrasive soap, cleaner or pad to clean your silicone mold!
Storing Your Silicone Mold:
- Storing Your Cured Silicone Mold (Storage longer than 1 week)
- First, apply mold release to your cured mold.
- Second, pour your casting material into the prepared mold. Or, you can insert a previously cast cured piece into the prepared mold.
- If your mold has a mother mold, place the mold and piece into the mother mold.
- Third, put your mold (if a smaller mold) with the piece in it into a doubled “Ziploc” type bag with all the air pressed out of the bags.
- Fourth, seal the bags tightly closed using either a plastic bag sealer or over-tape them with duct tape.
- For larger molds, use very heavy duty doubled garbage bags, remove all the air and seal tightly either with a plastic bag sealer or over-tape with duct tape.
- Finally, put your sealed, bagged mold into a plastic storage container with a lid, close the lid and store on a flat shelf/surface (NOT the floor or window) at continuous 70F out of direct sunlight.