How do you stop soap molds from leaking? Do you line the soap molds, or is there something that seals the edges?
Pouring at a slightly thicker trace is the easiest method. Until you get the hang of it, you can simply put some old soft soap in the corners out a couple inches each way. Shortening will work. If you have our Professional soap molds, yes, you should line it but not for leaking, for ease of de-molding.