When comparing test results, it is critical to ensure the test methods and types of samples are the same for each material.

When comparing test results, it is critical to ensure the test methods and types of samples are the same for each material.


Rubber test reports provide a significant amount of engineering information about a compound, and it's important to understand what all the data means. Be sure to note the following when reviewing test reports:

The time and temperature of the test, size, and shape of samples, and test methods must be the same to make useful comparisons between various materials.

Test data should be from a reputable laboratory with substantial experience working with rubber. Preferably, the facility is ISO-17025 accredited.

This article references ASTM procedures. The corresponding JIS, DIN, and ISO procedures typically produce similar results, but they are not identical in all cases.

Keep in mind that test-report inaccuracies can and do exist. Rubber test reports are a good fundamental starting point for material comparison and selection, but always carry out actual performance tests to verify the suitability of a specific seal material in a particular application. End users should never hesitate to contact seal providers for assistance in understanding test reports and interpreting results.

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