IP68 is a dust and water resistance rating meaning a device is fully dust-tight and can be submerged in water up to 1.5 meters for 30 minutes under standard test conditions.
The IP (Ingress Protection) rating is an IEC 60529 international standard describing a device's resistance to dust and liquid. The rating consists of two numbers: the first (0–6) rates dust resistance, the second (0–9) rates liquid resistance. IP68 means "6" (fully dust-tight) and "8" (can withstand submersion in water beyond 1 meter).
**How IP testing works technically:** Devices are subjected to standardized tests in laboratory conditions. For the "8" rating, the device is submerged in fresh water at a depth and duration specified by the manufacturer (typically 1.5 meters for 30 minutes). After removal and 30 minutes of air-drying, the device must still function normally. No water ingress is permitted inside sealed chambers (battery, circuits). Most flagships test at 1.5–2 meters; some claim deeper (Apple iPhone 15 tests at 6 meters for 30 minutes, exceeding IP68 spec).
**Why it matters to buyers:** IP68 rating provides confidence for water-prone activities: swimming, snorkeling, accidental drops in pools, or shower use. The rating is meaningful for durability — repairing water damage is expensive ($300+). However, the rating is only as good as the seal; cracks or manufacturing defects void the protection. Warranty typically excludes water damage even on IP68 devices.
**What to look for / common pitfalls:** - IP67: 1m fresh water, 30 minutes (adequate for splash resistance) - IP68: 1.5m+ fresh water, 30 minutes (good for beach/pool use) - IP69K: high-pressure jet resistant (industrial, not phones) - Important: saltwater (ocean), chlorinated pool water, soapy water, and pressurized water (shower jets) can damage IP68 devices — the rating only guarantees fresh water - Seals degrade over time; devices ~3 years old lose IP68 protection - Repeated submersion shortens seal life
Real-world examples 2026: iPhone 15 Pro (IP68, 6m/30min), Galaxy S24 Ultra (IP68, 1.5m), Pixel 9 Pro (IP68, custom depth), most budget phones (IP52–IP64, splash only). Rugged phones (CAT, Samsung Galaxy XCover, Doogee) target IP68+.