raider2119 First, just to cover myself here, I’m not sure I’d recommend this just because of the possibility of contaminating the mixture with something that would activate the cure. I don’t think that would happen but anything is possible. Stay away from anything with impurities like iron or copper in it, those might activate the cure and by the time you go to use it might no longer be viable. Anything that is too low (acidic) or even too high (alkaline) on the pH scale could have an effect.
Sea salt is safe as sugar. Are there specific things you are wondering or worried about?