Chosen Solution
Hello! I was wondering is I could add something to an iPhone 6 to make it water resistant. I already have the screen adhesive strips for an iPhone 6s, but will I need anything else to make it water resistant, or is not possible?
@albert8181 just because there are rubber gaskets at the Home and volume buttons does absolutely not mean it is water resistant. There are just to many areas where water will still enter your phone. I would suggest that you do not submerge it. Unless of course you do not like your phone. If you are planing to submerge it get a proper water proof case for it.
Personally I think the iPhone 6 is pretty water resistant the way it is. To be fair it is not that water resistant but I have seen multiple people do water tests on their iPhone 6 (up to 1 minute under at least a foot of water) and the devices survived. Maybe someone else can provide a better answer but I think you will be OK the way it is.
The best thing is to just get an external case which offer better protection. Altering the iPhones own case won’t do anything different than what Apple designed.