Hi Yira,
You can use Static Structural for the Gasket analysis.
The pressure-displacement curve of a gasket often starts with a low stiffness, making solver’s guess quite far from the final solution, and causing a number of iterations. But for gaskets, often a good approximation to the final displacement solution is known. So a few tricks may work to accelerate convergence by allowing the solver to start from a good first guess, or by forcing the analysis to follow certain displacement constraints during the iteration.
Check the below link for the guidelines in case you face convergence isues.
Guidelines of modeling a gasket
-Best
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