Sealing a 1'' pipe

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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maverik94
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Ok, a simple question. For my spring piston prototype, I need a 1" pvc piston, it pretty much needs to be filled with something that will make it airtight, so no air leaks out of the piston. Thanks!
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Give me a lever long enough, and a fulcrum on which to place it and I shall move the world.
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jonnyboy
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Seriously!? 3 different topics for something that could be put in one?

Epoxy
mobile chernobyl wrote:I can shoot a Canuter Valve off my '82 Chevy Ram F150 AT LEAST 3/4 Mile with 'ma cannon made of soup cans duct taped together, then I just squirt some bacardi 151 in the chamber and hold up my cigarrete lighta and WHOOSH! That thing flies at least 3/4 mile
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Biopyro
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In before JSR - Epoxy? Edit: beaten to it!
Also try PU expanding foam, polymorph, melted plastic bags.

What sort of properties were you after?
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maverik94
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sorry for the multiple posts. Well, it just needs to be airitight, strong, and cheap. What kind of epoxy?
"You can't be friends with anyone if you aren't friends with yourself."
"I'd rather be hated for who I am, than loved for who I'm not." -André Gide
Give me a lever long enough, and a fulcrum on which to place it and I shall move the world.
–Archimedes
Defeat is always momentary.
–Carl Denham

Current Project: None, I'm in Spudremission.
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Biopyro
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Putty or resin will be fine. There is a post in the how-to database explaining the whole process.
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety. -Benjamin Franklin
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covey12
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just get jb weld, or that expoxy that comes with both parts in one plunger
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Hubb
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I took a section of the pipe to a hardware store and bought a wooden dowel that fit in it. It was just a little bit small, and this gap was fixed with some duct tape...assuming that all you need is a good fitting piston.
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Technician1002
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hubb017 wrote:I took a section of the pipe to a hardware store and bought a wooden dowel that fit in it. It was just a little bit small, and this gap was fixed with some duct tape...assuming that all you need is a good fitting piston.
If the fit is very close a few layers of Polyurethane varnish may do the trick.
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maverik94
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ok, I understand how to do that. Thanks yall!
"You can't be friends with anyone if you aren't friends with yourself."
"I'd rather be hated for who I am, than loved for who I'm not." -André Gide
Give me a lever long enough, and a fulcrum on which to place it and I shall move the world.
–Archimedes
Defeat is always momentary.
–Carl Denham

Current Project: None, I'm in Spudremission.
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