[Nhcoll-l] Putty For Sealing Jars

[James Maclaine]

Dear all,

Happy New Year!

Hope someone can help with a large jar sealing question.  In the past we have used a kind of putty (made by Arboseal) to seal flat glass plates to the top of some of our largest jars and containers.  This was especially useful in the case of some of the older jars where the top is not completely flat and the putty could fill in the gaps.  It isn't an ideal solution (and makes opening the jar a bit of a chore) and in some cases the putty has hardened and cracked but on the whole it has fairly effectively slowed down evaporation over several decades.

However, in the cases where the old putty has to be replaced I can no longer find the same brand for sale online, so can anyone tell me where I can purchase something similar and reliable that I could use for this?  Or ideally, let me know of a better way of sealing a flat lid on an uneven jar top (please don't suggest stretching parafilm over it!).

As these are large containers for specimens that would be difficult to find alternative storage for (see attached), I'd like to keep using them if possible.  They would also be prohibitively expensive to replace.

Any suggestions would be much appreciated.

Cheers,

James



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