Hi!
I’ve been reading some of the older threads about humidity and I’ve read the word “safe” in various occasions. What’s that? Can anyone share a link to a “safe” on amazon or ebay so that I can see what it is, please?
Thank you! 
PS: humidity sucks 
“Safe” is used loosely and applies to many things. These two being most common when anyone that I know uses the term. Deal with humidity by having desiccants inside. You need to open them every so often so as not to get too dry inside as well in some cases, all depends on what you are storing.
Thanks, @gottaketchumall! I’m a bit worried about my binder collection. I’ve recently moved and there’s 80% humidity in my new city 
I have the cards in perfect fit sleeves and inside an Ultra Pro Pro binder, but I’m not sure if that’ll be enough
This is what we use in my lab desiccators. Its moisture absorption capabilities can be recharged in the oven at 450 Degrees F. As you can see from the date its been used since 1982 and still going strong! As long as you keep it in an airtight space and aren’t opening and closing that space regularly it will keep everything bone dry. It’s blue when fully charged and turns purple when it needs to get cooked again. Spread it evenly in a metal pan or something at the bottom of wherever you need dried.
Amazon Link: www.amazon.com/Indicating-Drierite-desiccant-1-lb-bottle/dp/B001D7GH9M
Well done pokeA@ great info…
80% is high. I have a powerful dehumidifier that I run sometimes and when I leave it going the air goes to about 48%. You wouldn’t believe how much water it pulls out of the air. I would say about 60%- mid 50s is comfortable for people and a safer range for cards. I hope that answers your question because I can’t really tell if this is about safe humidity level or storage safes lol
Quickest and best solution is buy a good dehumidifier($100-$200 probably but a good investment).
I double sleeve my cards before putting them in my binder, makes them waterproof.
KMC perfect sleeve then ultra pro premium sleeve, this sleeve is small enough to fit a binder without the waves you get with regular penny sleeves.
I highly doubt that would be “waterproof” enough to escape humidity. It likely wouldn’t truly be air or water tight. Definitely well protected, but I just don’t see waterproof from that arrangement at all.
I understand what you are saying that they are sealed very tight and you could likely spill or splash over them and have loads of time to clean it up before any cards get damaged. “Water resistant” maybe I guess. That being said, I think the cards are still overall seeing the same humidity as the room they are in unless you have them sealed in a tote/box/safe or something similar with desiccants. An easy test to see if your cards are truly water tight would be to submerge a couple commons in a container of water for a few days double sleeved and in a binder. I imagine at the end of the week you’d have wrecked the cards.
Thank you all! I’ll buy some dessicant and keep them in a binder with kmc perfect fit sleeves inside my cupboard. That’s the best I can do for now… I hope that not getting them out much, they’ll be ok