iPhone 5s Bike Mount

[Smartboy]

Can anybody recommend a secure and waterproof mount for an iPhone 5s on a road-bike.

I'd like to use my phone for Sat-Nav guidance so I'd need to be able to see the screen when mounted on the bars.

Seems to be plenty of choice out there, but definately needs to be waterproof and pretty robust as I'll be using it every day in all-weathers.

Probably won't use it on the MTB as it would probably get damaged in my first unplanned-dismount (which happen regularly!).

[SkinnyBoy]

Quadlock.

[littleandy0410]

Another vote for the Quadlock. Used one with my iphone 5 in all weather, including on my 11 mile each way daily commute, and it was fine. I sold mine when I upgraded to an iphone 6+, but I haven't bought the Quadlock for that yet.

[Smartboy]

So the quadlock kit keeps the water out of the phone effectively does it?
I'll be out in the rain for about 1 1/2 hours each-way on my new 20-mile commute (cuurently just wrap the thing in a carrier bag and stuff it in the pocket of my waterproof jacket).