26/01/2026
We are often asked: what’s the difference between a gasket, a seal, and an O-ring?
At first glance, they might look the same, but understanding the distinctions ensures you choose the right sealing solution for your application.
From stopping leaks to keeping contaminants out, each plays a unique role in protecting your systems. Learn when to use a gasket vs a seal vs an O-ring and how to select the right material. Choosing the wrong one can compromise performance, safety, and efficiency.
For example:
Gaskets: Seal static joints and irregular surfaces, ideal for flanges, pumps, and HVAC systems.
Seals: Designed for dynamic applications where movement occurs, keeping fluids or gases contained.
O-rings: Compact, versatile rings that provide reliable sealing in both static and dynamic conditions.
Material matters too. Rubber, metal, graphite, PTFE, choosing the right one ensures your system performs under the correct temperature, pressure, and chemical conditions.
Read the full guide, to make sure your seal is a success. https://www.polymax.co.uk/blog/gasket-seal-o-ring/