Usb to mircosd adapter waterproof?

I have this tiny usb to micro sd adapter.

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I was thinking about getting a waterproof micro sd and keeping it with that adapter on my keychain. I don't know if there is anything other than metal contacts from the micro sd (which goes in the bottom back) to the usb(flat gold part). If its just some metal it should dry up and be fine, anything else...

I could try to get it apart with some tools, I have 2 of them and at $1.65 free shipping they're not exactly irreplaceable. There are small indents on the side which I assume helps hold it together, so i don't think its going back if it comes apart.