<div dir="ltr"><div dir="ltr"><div>Our newer cabinet door gaskets (Delta cabinets) are 60 durometer silicone. There are some gasket materials that have been subjected to Oddy tests on the Combined Materials Testing database -<a href="https://www.conservation-wiki.com/wiki/Project:Combined_Materials_Testing_Results_(Search_Builder)">https://www.conservation-wiki.com/wiki/Project:Combined_Materials_Testing_Results_(Search_Builder)</a></div><div>-Adam</div><div> </div><div><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Thu, Nov 20, 2025 at 8:57 AM Shoobs, Nate <<a href="mailto:shoobs.1@osu.edu">shoobs.1@osu.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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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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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);font-family:Calibri,sans-serif;font-size:14.6667px"><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)" target="_blank"><span style="color:rgb(5,99,193);background-color:white">mbd.osu.edu</span></a></span></div>
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<div id="m_-6236391638841702167divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Nhcoll-l <<a href="mailto:nhcoll-l-bounces@mailman.yale.edu" target="_blank">nhcoll-l-bounces@mailman.yale.edu</a>> on behalf of Lennart Lennuk <<a href="mailto:Lennart.Lennuk@loodusmuuseum.ee" target="_blank">Lennart.Lennuk@loodusmuuseum.ee</a>><br>
<b>Sent:</b> Thursday, November 20, 2025 8:41:15 AM<br>
<b>To:</b> <a href="mailto:nhcoll-l@mailman.yale.edu" target="_blank">nhcoll-l@mailman.yale.edu</a> <<a href="mailto:nhcoll-l@mailman.yale.edu" target="_blank">nhcoll-l@mailman.yale.edu</a>><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>Hi!<br>
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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><span>Lennart Lennuk</span></p>
<p><span>Head of collections</span><span></span></p>
<p><span>Estonian Museum of Natural History</span></p>
<p><span>00372 5656 9916</span></p>
<p><span><a href="mailto:Lennart.lennuk@loodusmuuseum.ee" target="_blank">Lennart.lennuk@loodusmuuseum.ee</a></span></p>
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