http://www.vermontpuremaple.com/maple_syrup_faq.htmhttps://web.archive.org/web/20160312080144/http://www.vermontpuremaple.com/maple_syrup_faq.htm
Above link states that the FREEZER is best for long term storage of pure maple syrup. ItIt is not supposed to be able to freeze solid since it is only 33-35% water.