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Author: Subject: Attaching 24/40 glassware joints to non-jointed flasks
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Registered: 24-7-2019
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[*] posted on 1-1-2022 at 08:19

Quote: Originally posted by Fyndium  
I have a couple of ground joints that are slightly asymmetric and leak under vacuum. A noticeable bubble trail can be observed when applying. I decommissioned these joints, one which was thermowell, not only because they leaked, although a powerful pump could overrun the leak easily, but because they can cause uneven stress distribution to glass, which can be catastrophic danger in vacuum work.

Wouldn't some vacuum grease work? I definitely have some joints that leak, but a gob or two of dow-corning vacuum grease seems to help.

By the way, if you buy dow-corning vacuum grease off ebay, be prepared to get a tube of dupont grease. I guess its the same thing, but caught me off guard. lol.

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