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Hey Lennart,</div>
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This topic has come up on the list recently. Institutions in the US tend to be using either Buna-N (a kind of synthetic nitrile rubber), or ethylene propylene diene monomer (EPDM) which is another synthetic rubber replacement. </div>
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<span style="font-size: 12pt;">Both have good longevity and track record compared to traditional rubber gaskets, for replacing the gaskets on bail-top jars. If you search the NHColl archive, I believe there were some European list members who sent in manufacturers
in Europe. </span></div>
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<br>
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But hopefully some others closer to you can advise!</div>
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Best,</div>
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Nate</div>
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<span style="background-color:rgb(255, 255, 255);font-size:9pt;font-family:Arial, sans-serif;color:rgb(51, 51, 51);line-height:1.5">-<br>
</span><b style="color:rgb(0, 0, 0);background-color:rgb(255, 255, 255);caret-color:rgb(33, 33, 33);font-family:Calibri, sans-serif;font-size:14.666666984558105px"><span style="font-size:9pt;font-family:Arial, sans-serif;color:rgb(187, 0, 0);background-color:white;line-height:1.5">Nathaniel
F. Shoobs, </span></b><span style="background-color:rgb(255, 255, 255);font-size:9pt;font-family:Arial, sans-serif;color:rgb(51, 51, 51);line-height:1.5">Curator of Mollusks<br>
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<div><span style="background-color:white;font-size:9pt;font-family:Arial, sans-serif;color:rgb(187, 0, 0);line-height:1.5">College of Arts & Sciences </span><span style="background-color:rgb(255, 255, 255);font-size:9pt;font-family:Arial, sans-serif;color:rgb(51, 51, 51);line-height:1.5"><span></span>Dept.
of Evolution, Ecology, and Organismal Biology, The Ohio State University<br>
Museum of Biological Diversity</span></div>
<div><span style="background-color:rgb(255, 255, 255);font-size:9pt;font-family:Arial, sans-serif;color:rgb(51, 51, 51);line-height:1.5"><span></span><span dir="ltr" style="color:currentcolor">1315 Kinnear Rd, Columbus, OH 43212</span><br>
<span dir="ltr" style="color:currentcolor">614-688-1342 </span><span></span>(Office)<br>
<a href="http://mbd.osu.edu/" style="color:rgb(0, 120, 212)"><span style="color:rgb(5, 99, 193);background-color:white">mbd.osu.edu</span></a></span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Nhcoll-l <nhcoll-l-bounces@mailman.yale.edu> on behalf of Lennart Lennuk <Lennart.Lennuk@loodusmuuseum.ee><br>
<b>Sent:</b> Thursday, November 20, 2025 8:41:15 AM<br>
<b>To:</b> nhcoll-l@mailman.yale.edu <nhcoll-l@mailman.yale.edu><br>
<b>Subject:</b> [Nhcoll-l] Material of rubber seal</font>
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Hi! What material should collection storage rubber seals are of? They should be archival quality, non-acid off-gassing. Lennart Lennuk Head of collections Estonian Museum of Natural History 00372 5656 9916 Lennart. lennuk@ loodusmuuseum. ee </div>
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<p class="x_MsoNormal">Hi!<br>
<br>
What material should collection storage rubber seals are of?<br>
They should be archival quality, non-acid off-gassing.</p>
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<p class="x_MsoNormal"><span style="">Lennart Lennuk</span></p>
<p class="x_MsoNormal"><span style="">Head of collections</span><span style=""></span></p>
<p class="x_MsoNormal"><span style="">Estonian Museum of Natural History</span></p>
<p class="x_MsoNormal"><span style="">00372 5656 9916</span></p>
<p class="x_MsoNormal"><span style="">Lennart.lennuk@loodusmuuseum.ee</span></p>
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