There are several products like Always Dry, Never Wet…
I used Never Wet, but it does not matter, I think all of them are pretty similar and similar prices/quality.
The idea it was to create something easy just for me to test how this worked and how I could use it as a tool for a project or something coming up. You never know, but definitely there is potential uses that I can imagine, messages that come up just when it rains… super cool idea!
Check the video of Never Wet Testing