IPX is the water-protection code in IEC 60529. The higher the number, the stronger the protection. When buying zippers you will most often see IPX6 / IPX7 / IPX8: IPX6 resists powerful jets, IPX7 handles temporary immersion, IPX8 allows continuous immersion.
IPX rating chart
| Rating | Test conditions | Protection | Typical uses |
|---|---|---|---|
| IPX4 | Splashing water | Everyday splashes | Light outdoor, everyday items |
| IPX5 | Water jets (low pressure) | General jets | Outdoor sports gear |
| IPX6 | Powerful jets (12.5 mm nozzle, 100 L/min, 3 m, ≥3 min) | Storm-level jets | Rainwear, dry bags, fast-dry wear |
| IPX7 | Immersion 1 m for 30 min | Temporary immersion | Wading, snorkelling, water sports |
| IPX8 | Continuous immersion >1 m (depth & duration per agreement) | Continuous immersion | Drysuits, military, medical pressure-sealed equipment |
Important notes
- IPX covers water ingress only — it does not equal airtightness or pressure retention; for that, check sealing-pressure tests such as 60 kPa.
- A product can pass multiple ratings; rely on the manufacturer’s test report.
- Ask suppliers for third-party or factory test reports for the rating you need.
