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# Chemical Compatibility: Start with the Seal
- URL: https://www.thedirtyfilter.com/chemical-compatibility-start-with-the-seal/
- Published: 2026-10-04T03:28:53.000Z
- Updated: 2026-10-04T21:41:01.000Z
- Description: Find seal compatibility references and the service conditions needed before selecting a compound.
- Author: Mark Blue
- Tags: Engineering Reference, Chemical Compatibility, Video

A housing's wetted components include more than its shell. Record the liquid composition, concentration, normal and maximum temperature, cleaning chemicals, and exposure duration before selecting materials. Use compatibility data to narrow candidates, then obtain confirmation for the actual seal compound and service conditions.

Parker's O-Ring Handbook is a reference for elastomer properties, sealing design, dimensions, and fluid compatibility. Its Section VII contains compatibility tables. Individual chemical ratings are not reproduced here; consult the current manufacturer's tables for the specific compound and conditions.

[Parker handbook download page](https://discover.parker.com/Parker-ORing-Handbook-ORD-5700) · [Manufacturer PDF](https://www.parker.com/content/dam/Parker-com/Literature/O-Ring-Division-Literature/ORD-5700.pdf)

Source: Parker Hannifin. Reference checked October 4, 2026 UTC. Handbook edition must be checked in the downloaded document.

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