The glands are all 'destroyed' in fingerhash by way of the intense friction required to get it off the hands and into a ball. The other methods of production dont do this to the same extent.
Itll withstand freezing temps ( some hash is even made this way ) but I dont know about extended periods. Sorry I cant be much help....even after googling it.
FunkyMonkey Reviewed by FunkyMonkey on . Very long term storage of hashish ? Hello, I am a hash lover and am stocking up on the stuff since I cannot trust my supplier to be there for the years to come. Since I dont smoke a lot, it needs to be keept for long periods of time. Currently, theres some in the refrigerator with wrapper that is airtight and that has been there for more than 6 months. Looks fine and tastes fine. I have just bought some more and would like to know if it can be stored safely for 1+ year. Rating: 5