Because gaskets are generally low cost and appear to be simple, the criticality of their role in a device is often overlooked. They usually don’t garner much attention until there is a problem with an application or if there are high maintenance cost to service the gasket. A gasket’s main function is to provide a robust seal of a gas or a liquid throughout the life of the application.
The gasket compensates for the imperfections between the mating surfaces to be sealed. This is done by utilizing external forces to compress the gasket material into the imperfections between the mating surfaces.
If the perfect mating surfaces could be achieved and maintained through the life of the application there would be no need for a gasket. Below you can find different gasket sheets depending on the application and your industry: