Silicone soap mould is used for small to medium batches because they're so diverse and very easy to release the finished bars from. A tug from the side and a push from the bottom is generally all you need to do to get them out. Silicone soap mould is non-toxic, lasts for years, and doesn't need lining or prepping. Silicone molds make unmolding both cold process and melt and pour soap easy.
Add 1 teaspoon of fine sea salt per pound (or 450 grams) of oils to your hot lye solution to dissolve. Give it more time. You might need to leave your soap in the mold an extra day or two. If you try unmolding after 24 hours and it doesn't want to come out, try again after another 24 hours