You are whipping this with a mixer so the dryflo/cornstarch wont clump, plus it is such a tiny amount. I made this several months ago (I'm thinking 4-5 months at least) and have a bit left-kind of an unplanned test of will it get yuckies or not and it has stayed great. Can't answer the e wax question for sure, but just go for it if it's just for you to try. I sub all the time and always end up with something usable. Glo