Re: Loose Grips Sink Ships
Small black o-rings are made out of various rubber and non-rubber based products, although again most would be of a petroleum based product. Most common in natural rubber although not gum rubber would be neoprene, the other non-rubber product though looking like it would be SBR which is synthetic Butyl rubber. First and most natural feature of an o-ring is it's ability to seal irregular shapes against leakage of oil, water & chemical based liquids or solubles. This information courtesy of a graduate of Sperry-Vickers and Parker Hannifin schools.
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