Sherlock Leak Detector Fluid

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8 oz1 gallon
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Manufactured to MIL-PRF-25567E.

Type 1 fluids formulated especially for safe usage with oxygen, but are equally effective on hydrogen, nitrogen, helium, air and other gases. They contain no oils, fats, ammonia, or other materials that would be inflammable in contact with pure oxygen.

Type 1 - For use from +35 degrees Fahrenheit to +160 degrees Fahrenheit

Type 1 is a neutral solutions formulated for leak-testing lines, cylinders and tanks carrying pure oxygen, but also used widely for testing fuel tanks, pneumatic systems - in fact any product or system that can be leak-tested with air or gas pressure.

Type 1 contains no oil, grease or any other ingredient that could combine with pure oxygen to form either a flammable or explosive mixture. Thoroughly tested and approved by both governmental and commercial laboratories. Apply to connection or surface suspected of leaking and watch for bubble clusters. Fine leaks form white foam which builds up for ten minutes or more, making detection sure and simple. Large leaks form clusters of large bubbles immediately on application.
California Prop 65 Warning Symbol

WARNING: The product may contain and/or expose you to a chemical(s) or substance(s) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm.



A great product, I can honestly say I’ve use this for over 40 years, and nothing else works like it does

Richard A Verified Purchase


July 6, 2021


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: What is the shelf life of the Sherlock Leak Detector Fluid?

Per supplier: One year from date of manufacture.

Q: I have a couple bottle of the 08-12291 leak detector, do you happen to have an MSDS sheet for our safety folks?

We have added the MSDS sheet to the Documents section of this web page. Please download and review there.

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