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O-Ring Compatibility with Ultra Low Sulfur Diesel fuel and rubber

Precision Associates has provided an excellent overview of compatibility issues with Ultra Low Sulfur Diesel fuel and rubber; we hope you find this valuable.  For additional information, contact Precision Associates directly at, or visit their website at

Ultra Low Sulfur Diesel  (ULSD) is diesel fuel that has a substantially lower sulfur content. The US and other nations have been moving to ULSD for some time. The change to lower sulfur content is expected to allow the application of newer emis­sions control technologies that should substantially lower emissions of particulate matter from diesel engines.  However, ULSD causes degradation and failures to standard engine rubber seals.  Click here for the full article.  

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