We don't normally recommend infomercial videos to our readers, but trust us on this one: This commercial for Rustoleum's NeverWet water-repellent spray is mind-boggling.
NeverWet's "super-hydrophobic coating" comes in two cans, a base layer and a top coat, that are applied separately. Once dry, any object that is covered in it becomes extremely water repellent.
Water will "sit up" on a sheet of glass rather than cross a treated area. Mustard and ketchup just fall off clothes.
And you can dunk a treated iPhone into a jug of water without harming it.
Check it out: