Did Apple add waterproofing to its new iPhone 6S without telling anyone? The crew at iFixit seems to think so. We had our suspicions, based in part on Apple patent filings in one particular area: waterproofing. Apple has been investigating a waterproof (or, more accurately, liquid proof) iPhone for at least the last several years. If that strip of sticky goop on the 6s wasnt put there to hold the display in, then maybejust maybeit was designed to keep liquids out. Like a gasket!