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Topic: Water resistant containers?, testing them< Next Oldest | Next Newest >
GPS Outdoors Offline
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    Posted: May 08 2010,8:30 pm QUOTE

Has anyone else devised a method of determining if their cache containers are trully weather-proof?  Besides AFTER you’ve placed a cache and gotten a note telling you your log is soggy?

I’m working on testing a few containers by putting tissue paper in them and a weight of some kind (I use large nuts or bolts dependant on the size of the container) and then placing it CAP DOWN in a bucket of water.  After 3 days I’ll check.  If any water got in, I’ll know by the mush that was tissue.

We all know ammo cans are NOT trully waterproof.  Are there any restrictions to putting silica gel bags in containers to absorb any condensation?  They seem to work great on much of my gear that gets stored outside (I’d know if ammo had gotten wet pretty easily).

I know Lock-n-locks are very very good, so are many of the Pelican case knock-offs but sometimes you just need a customized container


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DudleyGrunt Offline
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    Posted: May 08 2010,8:41 pm QUOTE

Sounds a like great plan.

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KFL Offline
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    Posted: May 08 2010,10:54 pm QUOTE

I used the method you described once and after a few rains found out that the container was not what I wanted. So in this case the method worked, although not with the desired result.

I would put the container really outside for some time. The bucket-method might catch some problems, but others remain. The water pressure and the weights might seal the container tighter that it would be in the wild. Also I would expect temperature differences in the bucket to be pretty limited. If a container was filled when it was hot and then (almost) tightly closed, it might actually suck in water (from rain) from the outside when it is cooler because then there is less pressure in the container than outside.

Another problem apart from the water coming into the container when that is shut is the water which comes in when it is open. I am not speaking about people signing in the rain, but about the moisture in the air. Depending on the region that can be a real problem sometimes. Logs can get damp or even wet just from that and ironically that is especially a problem if the container seals really tight.

I have mixed feelings about silica gel bags. I have seen cache contents destroyed by their remains. I can imagine that this depends really on the brand you use. Make sure they stay clean even when submerged in water, and you should be fine.

Do you know how much water such a bag can actually bind? I would image it's not that much. They are made to bind water from the air, not so much real liquid water. I could imagine one of such bags being 'full' with an ammo can-sized load of Louisiana-air in August.


Edited by KFL on May 08 2010,11:03 pm
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GPS Outdoors Offline
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    Posted: May 09 2010,5:11 am QUOTE

Concerning the silica gel packets, I'd be considering their use exactly as they wre intended; to pick up moisture in the air.

Their life expectancy IS limited (dependant on moisture content gained, etc) but with proper cache maint trips - something many cache owners are slack on due to a number of real-life factors - this shouldn't be much of a problem.  I'd personally only be using them in baggies which hold the log which is the main reason for doing this test.

Most swag is weather resistant (plastic doesn't get all mushy, hehe) but the log is what matters (to me anyhow).


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Quinn Offline
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    Posted: May 09 2010,2:07 pm QUOTE

I still Like the .50cal ammo cans with the rubber gasket. they seem to always work well in wet areas. though I am not sure I would actually place them in water.:D

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GPS Outdoors Offline
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    Posted: May 09 2010,3:17 pm QUOTE

I love the .50cal can cache, don't get me wrong but when I plan a 2 day backpack trip with a cache placement along the route the LAST thing I want to add is a few pounds of weight, hehe.  Hence, the alternative container.

Note on the latest... vitamin / pill bottles are NOT moisture proof :)  

Diagnosis... fail.

Otter boxes... pass (inexpensive version of a Pelican case)

Lock-n-lock... pass

Inexpensive lock-n-lock lookalikes... FAIL


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Joukkusisu Offline
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    Posted: May 10 2010,7:21 pm QUOTE

I would say ammo cans are pretty water tight.  I seen some completely submerged in water year round and still dry on the inside.
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mother wolf Offline
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    Posted: June 28 2010,7:26 am QUOTE

Where would ya get the silica gel packets aside from? other than from in med bottles or the occasional shipped pkg where do you find them?
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DudleyGrunt Offline
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    Posted: June 28 2010,7:54 am QUOTE

I don't know.  I think of them like pens.  Not something I'd ever have to go out and actually buy - they just seem to come my way.

Good to see you on the forums, MW!


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PC Medic Offline
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    Posted: June 30 2010,4:07 pm QUOTE

Quote (mother wolf @ June 28 2010,9:26 am)
Where would ya get the silica gel packets aside from? other than from in med bottles or the occasional shipped pkg where do you find them?

Check out silicagelpackets.com

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mother wolf Offline
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    Posted: June 30 2010,6:08 pm QUOTE

TY, I will check it out. MW :wave
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