how hard should sealing neoprene be?

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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mopherman
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i just looked on mcmaster and it has rubber sheet of diferent densities. how hard should it be?
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hi
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somehwere between the hardness of a rock and a pillow.

more spesificly, about as hard as an innertube, maybe slightly harder for larger barrels.
"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote

you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
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mopherman
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lol, I didnt see the last part of you post untill just a second ago. thanks though.


Would this work? 9455K874
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CS
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Yes, I believe that will work. I generally hear 60A, and 70A as the proper hardness.
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Velocity
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70A is great... I use the ultra pure version of neoprene (found on mcmaster). Its expensive, but I have not had a single sealing problem with it (there was one issue, but it was the washer that caused it).
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