I don't have a quantity of one blend on hand to seal away long term. That will change in about a month though. I'm not big on playing around with paraffin wax, I always end up making a huge mess with it. I think I"m just going to go with the heat up the jar, put in th tobacco and put on the lid technique. Heat sealing the mason jars keeps my vegetables good for years, I don't see why it wouldn't work with tobacco.
I know several other people do use this method with great success.