[Nhcoll-l] Supplier for Silicone Buna-n Gaskets

Thu Jul 28 04:33:37 EDT 2022

Hi there,

I would advice everyone who's interested in getting the rubber rings in 
whatever material they want (I prefer EPDM or FKM) to ask some local 
plastics processing company to make customized rings for them.

Depending of the manufacturer it could be a costs of around 1-2 Euros 
for the gasket, which thinking about the time that is saved in 
topping-up preservation fluid or cleaning degraded rubber from the jars, 
is totally worth it.

Here you have some nice examples of a charge of FKM Rings I got a few 
years back for the Ruhr Museum:

As said you can choose whatever plastic you prefer, but i have never 
heard of a "buna-n" (or NBR) - Silicon compound. Actually i think its 
not really possible to mix those. My advice, use silicone for 
water-based preservation fluids (e.g. formaldehyde solutions) and NBR or 
even better EPDM for alcoholic solutions, as ethanol can evaporate 
through the silicone.

The company that did the work here for me is called FRANKSA GmbH 
(https://www.franksa.de/) its a technical rubber manufacturer. I imagine 
that you can find someone similar in the US or other European countries. 
The plastics come in large rolls that are cutted in the desired size.

If you have a super low budget, you can buy the plastic role directly 
and cut the ring yourself. It work perfectly, but is kind of time 
consuming. But for 10-30 Rings its actually better, since the companies 
start from 500 rings usually. The best supplier for rubber rolls in 
Germany I know of is Reichelt: 
https://www.rct-online.de/de/halbzeuge/platten/gummiplatten-gummimatten-gummistreifen

I'm sure if you ask them, they can find suppliers in other countries as 
well.

Hope this helps a bit, since its very nice since you can get all the 
sizes you want. You can even have different hardness of the rubber and 
if desired even choose a specific color.

But if you can afford it try to go for the good old grounded stopper 
jar, in the end its a very useful investment and saves a lot headaches 
for future museum professionals.

All the best,

Am 27.07.22 um 22:27 schrieb Dirk Neumann:
> Hi all,
>
> thanks for sharing, Kris! Are there any manufacturers / retailers in 
> good old Europe ? We have a similar problem and currently want to 
> explore available options.
>
> With best wishes
> Dirk
>
>
> Am 27.07.2022 um 22:07 schrieb Murphy, Kris:
>>
>> This is the company we use:
>>
>> Potomac Rubber Company
>>
>> 9011 Hampton Overlook
>>
>> Capitol Heights, MD  20743
>>
>> (301) 336-7400
>>
>> Kris Murphy, Museum Specialist
>>
>> Smithsonian Institution
>>
>> Museum Support Center
>>
>> VZ, Division of Fishes
>>
>> 4210 Silver Hill Road
>>
>> Suitland, MD  20746
>>
>> murphyk at si.edu <mailto:murphyk at si.edu>
>>
>> *From:* Nhcoll-l <nhcoll-l-bounces at mailman.yale.edu> *On Behalf Of 
>> *Shoobs, Nate
>> *Sent:* Wednesday, July 27, 2022 3:58 PM
>> *To:* nhcoll-l at mailman.yale.edu
>> *Subject:* [Nhcoll-l] Supplier for Silicone Buna-n Gaskets
>>
>> *External Email - Exercise Caution*
>>
>> Dear all,
>>
>> While we are phasing out bail-top jars for most new acquisitions in 
>> the Mollusk Collection at Ohio State, we are looking to purchase new 
>> gaskets because we still use bail-tops for lots with volumes above 1L.
>>
>> We use the standard Le Parfait jars in the following sizes – opening 
>> diameters:
>>
>> 1L – 84.6mm
>>
>> 1.5 – 80.5 mm
>>
>> 2L – 84.0 mm
>>
>> 3L – 99.5 mm
>>
>> Anyone have a good bulk supplier of archival Silicone Buna-N gaskets 
>> for these? I vaguely remember a Smithsonian best practices document 
>> that had suppliers listed, but can’t find it online now.
>>
>> -Nate
>>
>> --
>>
>> The Ohio State University
>> *Nathaniel F. Shoobs*
>> Curator of Mollusks
>> College of Arts & SciencesDept. of Evolution, Ecology, and Organismal 
>> Biology
>> Museum of Biological Diversity, 1315 Kinnear Rd, Columbus, OH 43212
>> 614-688-1342 (Office)
>> mbd.osu.edu 
>> <https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmbd.osu.edu%2F&data=05%7C01%7Cmurphyk%40si.edu%7Ca3e21b4c98b94a35f31008da700a67aa%7C989b5e2a14e44efe93b78cdd5fc5d11c%7C0%7C0%7C637945487255001785%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=S4cMfDxJB90idIHiXj1dSvZqzrStrhLwfq6jwIqntk4%3D&reserved=0>
>>
>>
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>> NHCOLL-L is brought to you by the Society for the Preservation of
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>
>
> -- 
> 
>
> *Dirk Neumann*
> Collection Manager, Hamburg
>
> Postal address
>
> *Museum of Nature Hamburg*
> Leibniz Institute for the Analysis
> of Biodiversity Change
> Dirk Neumann
> Martin-Luther-King-Platz 3
> 20146 Hamburg
> +49 40 238 317-628
>
> d.neumann at leibniz-lib.de
> www.leibniz-lib.de
>
> -- 
>
> Stiftung Leibniz-Institut zur Analyse des Biodiversitätswandels
> Postanschrift: Adenauerallee 127, 53113 Bonn, Germany
>
> Stiftung des öffentlichen Rechts;
> Generaldirektion: Prof. Dr. Bernhard Misof (Generaldirektor), Adrian 
> Grüter (Kaufm. Geschäftsführer)
> Sitz der Stiftung: Adenauerallee 160 in Bonn
> Vorsitzender des Stiftungsrates: Dr. Michael Wappelhorst
>
> -- 
> Stiftung Leibniz-Institut zur Analyse des Biodiversitätswandels
> Postanschrift: Adenauerallee 127, 53113 Bonn, Germany
>
> Stiftung des öffentlichen Rechts;
> Generaldirektion: Prof. Dr. Bernhard Misof (Generaldirektor), Adrian 
> Grüter (Kaufm. Geschäftsführer)
> Sitz der Stiftung: Adenauerallee 160 in Bonn
> Vorsitzender des Stiftungsrates: Dr. Michael Wappelhorst
>
> _______________________________________________
> Nhcoll-l mailing list
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> https://mailman.yale.edu/mailman/listinfo/nhcoll-l
>
> _______________________________________________
> NHCOLL-L is brought to you by the Society for the Preservation of
> Natural History Collections (SPNHC), an international society whose
> mission is to improve the preservation, conservation and management of
> natural history collections to ensure their continuing value to
> society. Seehttp://www.spnhc.org  for membership information.
> Advertising on NH-COLL-L is inappropriate.
-- 

Tel: +49 (0) 1573 2778729

Web: www.naturhistorische-konservierung.de
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