High quality platinum silicone molds can withstand quite a number of pours. The one product that will cut the life of a mold the fastest, is the one product mostly used with silicone molds. Epoxy resin B Sides are the activator side of the resin systems. They are naturally a corrosive. Some brands or manufacturers B sides are more corrosive than others. Not all epoxies are equal. Formulations change from one company to another and one product to another. So, how long will our molds last? Typically, when used with a mold release, they can last up to 30+ pours and beyond. However, that is dependent upon how well the mold is cared for. In some instances, molds used without mold release, without cleaning with isopropyl alcohol 90% or higher, and used with a highly corrosive brand of epoxy, you might not get much past 3-10 pours before the mold starts sticking. As you can see, there are a lot of factors that go into lengthening the life of your mold.