SpudFiles

I personally would use JB Weld any day over epoxy. When I was building my last cannon I originally used 5min epoxy for my valve mod after only a few shots the valve starting leaking air from the old solenoid orifice. I had the scrape out all of the old epoxy and redo the mod with JB weld. I've been using JB Weld ever since with no leaks. The only thing I'll give epoxy is its faster 5min. vs. up to 1 hour to set. I think the problem with epoxy is that it’s too brittle, JB weld is quite flexible. Any thoughts?

I'd take JB Weld because I like how it basically turns to Steel when it hardens so you know it's strong...

I have JB Wink or something and it set's in 4 Minutes (I've used my gun after the sprinkler's solenoid set only for 3 minutes), but it takes about 15 minutes until %100 hard (rock hard)

I have accually never used Epoxy so I can't really vote, but I think JB Weld is better for most Applications while Epoxy is better for some...

I like epoxy better because JBWeld looks and smells like crap

JB weld is an epoxy

Just to to clarify I'm talking loctite/devcon Epoxy Vs. JB Weld that is a \"Epoxy Steel Resin\" (cold weld)

epoxy is rated up to 2500 pounds per square inch for the longer set ones that take a day

JB weld is good up to 3960psi

Ya, but does that matter in our application?

It’s very important, the stronger the bond the less chance you have of being maimed by flying fittings or gauges.

They are both rated to over 10 times the common pressure used in our guns! And that is with a safety margin!

That’s true but the psi rating of epoxy is not actually its pressure rating. It's just a measurement of strength.

Yes, and the tensile strength of PVC is in the neiborhood of 7,000 psi.
Doesn't mean PVC pipe can take that type of pressure.
Incidentaly, the best epoxy I've seen in hardware-store type places had a UTS of 4,500 psi. It wasn't one of those really-long-set-time epoxies either.

Anyways, I've never acctualy used JB weld.
Does it have a paste or putty type consistancy, or is it a gel/fluid like the vast majority of others? Because I wouldn't think a gel-type epoxy would work very well for filling gaps.

Basically it's a two part epoxy... you have the resin, and a hardener. Mixed together they form something the consitency of... err...glop. That's all that I can say to describe it, but it's really viscous...to the point where it's a pain in the ass to get it off what you're spreading it with.

So to answer your question, it has a paste consistency. I wouldn't say putty like, becuase putty is most definitely easier to work with.

I like the consistency of JB Weld because it doesn't run everywhere like most epoxies.

my mom has some PC-7 it works really well and iv not had any problem with it other than its a little pricy, i mixed it and put a blob on a pice of sheet metal and pounded it with a hammer and nothin happened, its consistency is that of play-do