How to Verify a Case is Actually IP67

IP67 is one of the most over-claimed ratings in the protective case industry. Many cases labeled 'IP67' on Amazon or Alibaba have never been tested. A self-declared IP67 is meaningless — it just means the manufacturer thinks the case might pass.

This guide gives you 7 concrete steps to verify an IP67 claim, from checking the test report to in-house verification. Based on KeXinMaterials' 12 years of IP67 case manufacturing and our own test program at CTI (CNAS-accredited lab).

Key fact: A genuine IP67 test costs $500-$2,000 at an accredited lab and takes 7-15 days. A manufacturer who claims IP67 without a test report is either self-declaring (worthless) or cut-rate (avoid).

Step 1: Ask for the Test Report

The first and most important step. A real IP67 claim comes with a test report. A self-declared IP67 is not worth the paper it's written on (which, in fact, is none).

What to look for in a test report:

• Lab name and accreditation: SGS, TÜV Rheinland/SÜD, Bureau Veritas, CTI, Element Materials Testing, Intertek, SAI Global, etc. The lab must be accredited by A2LA, NVLAP, CNAS, UKAS, or equivalent.
• Standard reference: IEC 60529 (international), EN 60529 (EU), GB/T 4208 (China), or NEMA equivalent. The test method must be specified (IP6X for dust, IPX7 for water).
• Sample size and batch number: At least 3 sample units. The report should include the manufacturer's batch or serial number for traceability.
• Test date: Within the last 3 years. IP ratings can degrade with material aging.
• Pass/fail criteria: For IP6X: no dust ingress after 8 hours. For IPX7: no water ingress after 30 min immersion at 1m.
• Test conditions: Pre-conditioning (temperature, humidity), test environment, sample aging.

Red flag: No test report = no IP67. Walk away.

Step 2-3: Verify Lab Accreditation + Report Date

Verify Lab Accreditation

Every accredited lab has an accreditation number. You can verify this number on the accreditation body's website:

• A2LA (American Association for Laboratory Accreditation): www.a2la.org
• NVLAP (National Voluntary Laboratory Accreditation Program): www.nist.gov/nvlap
• CNAS (China National Accreditation Service): www.cnas.org.cn
• UKAS (United Kingdom Accreditation Service): www.ukas.com
• DAkkS (Deutsche Akkreditierungsstelle): www.dakks.de
• ILAC (International Laboratory Accreditation Cooperation): ilac.org

Search by lab name or accreditation number. If the lab is not accredited, the test report is not credible.

Check Report Date

Test reports are typically valid for 3 years. After that, the report should be renewed. The report should clearly state the test date. A test report from 2018 is no longer valid for a 2026 case (materials have aged, designs may have changed).

Step 4-5: Check Sample Size and Test Coverage

Sample Size (Minimum 3 Units)

A valid IP67 test must include at least 3 sample units, randomly selected from a production batch. The test report should state the sample size and batch number. A test on 1 sample is statistically invalid (could be a 'lucky' unit). KeXinMaterials tests 3 units per batch and 5% in-production sample testing on every shipment.

Test Coverage (Both IP6X and IPX7)

IP67 means BOTH IP6X (dust) and IPX7 (water). Some manufacturers test only one (e.g., IPX7 only) and claim 'IP67' — this is technically incorrect. Verify the report covers BOTH tests.

What a complete IP67 test includes:

• IP6X (dust): 8 hours in dust chamber with talcum powder (75μm). No dust ingress observed after test.
• IPX7 (water): 30 minutes immersion at 1m depth in water. No water ingress observed after test.
• Sample preparation: Aging at 25°C / 50% RH for 48 hours pre-test. Seals engaged normally (no over-tightening).

Step 6-7: In-House Verification + Sample Test

Step 6: In-House Air Pressure Test

You can do a quick in-house verification using air pressure. This is not a substitute for an accredited IP67 test, but it does catch obvious defects:

1. Close and latch the case normally.
2. Use a bicycle pump or low-pressure air source (max 30 kPa / 0.3 bar).
3. Apply pressure through a small hole in the case (drill if necessary) or via the pressure valve (if equipped).
4. Submerge the case in a water tank.
5. Look for bubbles. Even one bubble indicates a leak.
6. Hold pressure for 30 seconds minimum.

If the case passes, it's likely genuine. If it fails, the case is definitely not IP67.

Step 7: Order a Sample and Test in Your Environment

The final test is real-world. Order a single sample (most factories offer $50-$200 samples, refundable against order), and test it in your actual use environment. For example:

• For marine use: submerge in saltwater for 30 min, then inspect for corrosion or leaks.
• For industrial use: drop from 1m onto concrete, then verify IP67 still holds.
• For tropical use: leave in direct sun for 1 week, then verify gaskets haven't deformed.
• For cold use: leave in -20°C for 24 hours, then verify the latches still close.

KeXinMaterials offers samples at $50-$200 with full refund against order. Request a sample →