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What do you use Vaseline for?
(lemm.ee)
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~Icon~ ~by~ ~@Double_A@discuss.tchncs.de~
Lubricating the O ring that sits inside the watch case of vintage divers watches to keep them waterproof.
Most O-rings are made with a material called "Buna-N" (Nitrile), which is not degraded by oils, greases, or common fuels