Originally Posted by Deer Slayer
How about pressurizing 5psi or so of argon?? Put in a silica pack to absorb the moisture that may be forced out of any air present when it's packaged, ane pressurize the container to 5psi with an argon tank. You'd have to try it first with the containers empty with compressed air, and watch the pressure. Use tire valve stems, and seal the caps on after you fill them. You use the method where you fill it without the cap, letting the heavier argon force the air out. Then put the cap with the valve stem on the top. Fill to 5psi, and you're done. The pressure would compensate for external pressure of moisture trying to get in. I know a guy that does that with his welding rods. Seems to work for them, especially the moisture sensitive ones. Certain welding rods don't work right when the coating gets saturated with moisture.
Page two, this is what I suggested except you wouldn't need to pressurize. Argon is heavier than air. Just let it sit a few seconds and it will displace. I think at 4 ft deep we are not talking about enough Hydrostatic pressure to permeate a good glue/silicon seal. I always found that I can keep rods dry by burning a 40wt bulb inside a old chest fridge. Argon would work though.
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