Is Apple Watch Still Waterproof After Screen Replacement?

Normally, Apple watches aren't water-resistant after screen replacement unless the damage is serviced by an authorised Apple Service Provider, in which case they make sure the watch is properly sealed. If the watch was serviced by a third-party repair shop or by yourself, it is highly unlikely to be water-resistant. Independent service providers do not cover Apple's warranty or AppleCare plans. But, they might provide their own repair warranty.

And Apple doesn't repair watches; it is always a replacement. When it is replaced by Apple, the water resistance will still be intact. Therefore, servicing the Apple Watch is safe when it is done by an Apple Service Provider. Service can be obtained for free when the watch is covered by the Apple Service Warranty.

The most important fact about the Apple Watch series is that none of the Apple Watches launched up until now are waterproof. They are water resistant, but not waterproof. The difference between waterproof and resistant is that water-resistant means the ability to stop the penetration of water to a certain extent, whereas waterproof would mean it is impermeable to water. 

The latest Apple Watch series 7 has a water resistance rating of 50 metres. This means it can be used for shallow water activities, such as swimming in a pool. However, they should not be used for scuba diving, water skiing, or other activities involving high-velocity water or submersion below a shallow depth.

In brief, it is better to get your Apple Watch serviced by Apple Service Providers rather than independent service providers to keep the water resistance intact.