IP68 is part of the Ingress Protection (IP) classification system, which rates how well a device resists dust and water. The first digit (6) indicates total dust protection, whilst the second digit (8) means the device can withstand continuous submersion in water beyond 1 metre depth.
When a phone carries an IP68 rating, manufacturers must specify two critical details: maximum depth and duration. A typical smartphone rating might be IP68 30m/30min, meaning it survives submersion up to 30 metres for up to 30 minutes. Some flagships reach deeper ratings like 100m/3h.
What this means for you:
- You can use the phone in rain, splashes, and brief dunks without worry
- Intentional submersion, such as underwater photography or beach use, is possible within the rated limits
- Dust won't enter the device in normal use
- The rating does not cover pressure washing, saunas, hot tubs, or saltwater corrosion
- Ports sealed with adhesive or caps mean no cables can be attached whilst submerged
Common misconceptions: IP68 does not mean lifetime waterproofing. The sealants degrade over time, thermal stress weakens seals, and physical damage voids the protection. Accidental damage to the device may compromise the rating immediately.
When comparing phones with IP68, always check the actual depth and duration specifications. IP68 30m/30min offers less protection than IP68 100m/3h. Real-world use rarely tests these limits, but the rating provides confidence for occasional water exposure.