24/09/2026
O-rings are simple components, but their long-term sealing performance depends on getting the details right.
One common cause of leakage is compression set, when an O-ring loses its ability to recover its original shape after prolonged compression. The result? Reduced sealing force and, ultimately, potential leakage.
In this article, we look at what causes compression set, how factors such as temperature, material, hardness and squeeze affect it, and what to consider when selecting an O-ring for long-term reliability.
https://www.polymax.co.uk/blog/why-compression-set-causes-o-rings-to-leak/