Resources

Find our comprehensive chemical compatibility checker below – which several of our clients find really helpful, alongside some answers to common questions in the dropdowns and links to videos we put together. We hope you find them helpful, but please contact us with specific queries if you can’t find what you need here or elsewhere on the site.

Chemical Compatibility Checker

Navigate through our Technical Datasheets to check chemical compatibility of various different materials.

Common questions

The compression set (ASTM D395) of a material is the permanent deformation remaining once a force applied to it has been removed.   Rubber and elastomeric compounds permanently deform under strain. The rate and degree of permanent deformation is determined by the type of elastomer, the force applied, how long it is applied for and a number of other factors like temperature and chemical exposure and other environmental conditions.

This is of particular concern when elastomers are used to create seals. Deformation and decreasing seal force have the potential to result in leaking seals over time.

To measure compression set, the difference between the height under force and the height 30 minutes post force removal (in order to allow recovery and to measure permanent deformation) is expressed as a percentage. A compression set of 0% means the material completely returned to its original height. 100% compression set means that the material remained in the deformed position and did not recover at all when removed from the fixture.

Useful videos

Top Mistakes Made in Component Material Selection

Five Important Considerations for Designing Bonded Material Components

Advanced Materials: Comparing Silicones to Thermoplastic Elastomers

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