I wouldn't recommend this product for underwater photography; but, it is logical that a spray coating on electronic parts and batteries could offer protection from the occasional spill or dunk. Try it at your own risk, and use an old phone for testing. I have had my Note 4 over a year now, and haven't felt the need to waterproof it. I keep it in my pocket or case, and I learned a long time ago not to use my phone in the bathroom or in a canoe. Only $40 to test on your own phone. What have you got to lose? Oh, yeah. $700.