If it's that cheap, why don't you start your own shop doing it.
Heck, you should be able to do it for $20 and make a killing.
In other words - you don't know anything about how much cost it would add to Apple.
-t
How much would it cost then? Give us your magic number?
Why should I start a shop?
Well, let's say I do it. I follow your wise advice and open a shop for waterproofing iPhones. I will have no need to do any calculation, I already have a financial tech guru from MacRumors forums setting the price.
$10 per iPhone, and if you want the turtle777 special $20, free consultation included.
The story could be like this: small entrepreneur waterproofing shop, let's call it T-Shell, as for Turtle Shell, LLC. Nice name as the turtles are amphibians and live pretty well in and out of the water.
A company idea that started from a MacRumors discussion thread, has sky rocketed with service requests to waterproof iOS devices, the devices that are waterproofed by this service, need to be opened to apply the coating, therefore voiding the warranty coverage.
Then the shop will be all over the news small waterproofing shop that overcharges the public for the turtle special that also voids the warrabty ran out of business as now it is an industry standard to have waterproofed devices.
If you care to read the thread title, what I wanted to discuss is from the factory, and that means that the waterproofing is done at the factory.
Thanks for your contribution, I really appreciate the discussion. Some people seem to prefer not to have their iPhone waterproofed, and that is OK.
I do prefer if all the iOS devices have this kind of robustness sometime in the near future.