That works like shit, friend had that done, he then demonstrated it by dunking it into a beer > bam screen off, phone dead. Then someone with an Xperia Z was laughing the loudest, screaming watch this!
And that guy slammed his Sony so hard in his beer the glass broke and his phone bounced from the bar onto the concrete ground and was completely shattered
Moral of the story: waterproofing doesn't do anyone good.