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Do not use 5 min araldite, it tends to soften and even let loose after some time. (couple od years).
24 hour version is much better, especially if you allow to it cure under sunlight (UV light) and/or at elevated temperature (60C or higher, it cures after 15-30 minutes under those conditions).
However, the best option in my opinion is non-acidic (or non-corosive) silicone rubber.
But before you do anything, just make sure the rubber will cure - with one particular syringe I had a bad experience with, it would not cure at all even after 5 days, and I had to try to use it on my own diagonal!!! The other tube was OK (12 hours and the job was done)
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