+jaceyb99 Posted August 17, 2010 Share Posted August 17, 2010 I think I have finally solved a mystery - why my waterproof, airproof containers still get damp inside. Apparently it's due to the air inside condensing in the hot weather. So... does anyone have any ideas on how to stop this ? I had thought about putting a few grains of rice inside, like they do with salt containers in foreign countries. I would go for the proper sachets, but I have about 200 caches and that will be expensive Quote Link to comment
+9Key Posted August 17, 2010 Share Posted August 17, 2010 I use the moisture absorbent packets that come in some consumer products. You can buy them in bulk on ebay for cheap. Quote Link to comment
+mesillywoohoo Posted August 17, 2010 Share Posted August 17, 2010 I would try the rice and see if it helps but you should put a note in the cache that the rice is to stop condensation You can buy silica gel packets in bulk too though http://www.silicagelpackets.com/silica-gel-packets/ Quote Link to comment
Clan Riffster Posted August 17, 2010 Share Posted August 17, 2010 ...waterproof, airproof containers... What kind of containers are you using? Quote Link to comment
+jaceyb99 Posted August 17, 2010 Author Share Posted August 17, 2010 ...waterproof, airproof containers... What kind of containers are you using? Cheers for the comments, I have ordered 100x gel satches for £3.99 so I am happy The containers I use are medical sample containers (unused !!!) Screw top with a nice tight seal I wrap them in camo-tape, so I guess the heat generated in sunshine causes the condensation inside Quote Link to comment
+kunarion Posted August 17, 2010 Share Posted August 17, 2010 (edited) I have ordered 100x gel satchesYou should to swap them out if they become saturated. Maybe you can dry and re-use them. If maintenance becomes a problem, you could try making cache logs from waterproof or weatherproof paper. Due to pressure changes, moisture can be forced inside some containers. Edited August 17, 2010 by kunarion Quote Link to comment
+GeoGeeBee Posted August 17, 2010 Share Posted August 17, 2010 Those little packets of silica gel won't really absorb much moisture. Once they become saturated, you'll need to replace them. I'm not sure how long it would take in a typical cache before the packet had all the moisture it could hold. But it seems like you'd only be delaying the problem, not solving it. But if you want to give it a try, here's an interesting tidbit from Wikipedia: "Silica gel is also used as cat litter, by itself or in combination with more traditional materials, such as clays including bentonite. It is trackless and virtually odorless. Silica in this form can be a cost effective way for retail consumers to easily purchase silica gel for application in such things as keeping tools rust free in damp environments, long term storage, and preservation of dried food for long term storage." It appears that the cat litters with some variation on the word "Crystal" in the name are composed primarily of silica gel. That's got to be cheaper than buying those little packets! Quote Link to comment
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