I created a mold using silicone rubber and encountered sticking issues. I understand that silicone rubber is not supposed to stick to anything. What could have caused this?
While silicone mold rubber generally has excellent release properties and won’t stick to most surfaces, it may adhere to materials with open pores (such as open grain wood, very dry plaster, concrete, etc.). It can also bond to glass, surfaces coated with shellac, and itself (which can be advantageous when adding new silicone to a cured mold).
