Scope and common interpretation errors
For correlation of two methods on one assembly. Air-test values do not convert directly into an IP rating.
Wetting, surface tension and retained liquid affect water tests; temperature and system volume affect air tests. Residual water may temporarily block a path during a subsequent air test.
Turn the review into recorded checks
| Step | Action and evidence |
|---|---|
| 1 · Check test order | Record water-then-air separately from air-then-water and confirm drying state. |
| 2 · Align assembly conditions | Review pressure direction, fastening and fixtures so both methods address the same boundary. |
| 3 · Build correlated evidence | Keep both results for known-defect and sound reference parts. One specimen cannot establish a universal conversion. |
A comparison to avoid misinterpretation
If air results improve after water testing, compare dry and wet states and inspect the leak location before using wet-state results for production release.
Frequently asked question
Does passing an air-leak test justify IP68 labeling?
No. An IP rating concerns complete-product tests under specified conditions.
Background and further reading
This note addresses one specific question. For broader concepts, see the related background guide.
Related question: Locating Leaks in Multiport Assemblies: Fixture Baseline First.
External references support the relevant concepts. The review steps and scenarios are independent engineering discussion guidance, not quotations from a standard or external organization. Use agreed methods, applicable document revisions and complete conditions.
Apply this to your custom part
Compare the structure with Shaped Silicone Housing Gaskets for Wearable Devices. Describe the application, geometry, operating conditions, quantity and problem to solve. Submit a custom-parts inquiry, or see how to send drawings and sample photographs by business email. Confirm material, dimensions, costs, testing and delivery requirements for the project.
