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Sealing Material

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Sealing Material

Unread postAuthor: Atlantis » Fri Jul 20, 2007 1:26 am

I know this has been asked before but whats a material that can be found easily that will make a good face seal on a pneumatic, I have all the parts for my pneumatic I just can't get a good seal. I've tried inner tube, baloons, and a few other things.
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Unread postAuthor: homedepotpro » Fri Jul 20, 2007 1:49 am

go to ace hardware and look for gasket material, or neoprene sheets. it comes in like little 6'' squares
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Unread postAuthor: Atlantis » Fri Jul 20, 2007 1:51 am

Oh, I didn't realize you could get neoprene at local hardware stores, I thought it had to be ordered. What isle would that be under?

P.S. What's the price on neoprene?
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Last edited by Atlantis on Fri Jul 20, 2007 1:58 am, edited 1 time in total.
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Unread postAuthor: MrCrowley » Fri Jul 20, 2007 1:57 am

If your other sealing faces are bolted on, make sure the bolt isn't leaking.
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Unread postAuthor: Atlantis » Fri Jul 20, 2007 1:59 am

I never bolted them on that might be the reason, would bolting innertube to my piston work?
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Unread postAuthor: tylerthetatertosser » Fri Jul 20, 2007 2:37 am

use an inner tube with silicone to hold it on so there is more cushion under ther inner tube.
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Unread postAuthor: chaos » Fri Jul 20, 2007 3:21 am

make sure your sealing face is flat, this is one of the most important pieces of a piston valve.
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Unread postAuthor: frankrede » Fri Jul 20, 2007 4:27 am

chaos wrote:make sure your sealing face is flat, this is one of the most important pieces of a piston valve.
well that explains alot lol.
My sealing faces are flat, but what the go on aren't:(
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Unread postAuthor: chaos » Fri Jul 20, 2007 5:27 am

frankrede wrote:
chaos wrote:make sure your sealing face is flat, this is one of the most important pieces of a piston valve.
well that explains alot lol.
My sealing faces are flat, but what the go on aren't:(



well it does explain a bit but not a lot i guess,

but what the go on aren't:(

now that that makes no sense.

seriously though having a flat sealing face is 50% of the seal, the other 50% is the piston face which has to be flat also.
and i dont mean flat as in "looks flat" i mean flat as in square honed i suspect it might be a bit different with pvc but with metal it pretty much needs to be perfect to get a real good seal.

may i ask you atlantis, what pressure are you running this at?
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Unread postAuthor: Atlantis » Fri Jul 20, 2007 12:33 pm

I haven't really pressurised it yet, I'm not gluing it until I'm sure it seals.
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