"factory sealant was just " dumb dumb" remained flexible and "gooey" for life .. I know when I have ever taken any Trekkers apart it was usually a tough job . but that is 30 year old technology , and not real positive its available anymore . I'm using a newer product on mine sikaflex .. it's real good stuff , and much like the original , will not harden , but stay flexible and waterproof."
Can you please post a link to this stuff as I will be needing some this summer for my longbox