gasket
n.n. a thin ring or strip of material that you put between two parts to stop them from leaking. It keeps liquids or gases from escaping where they are joined.
n. a flexible ring or strip of material, such as rubber or metal, used to seal the joint between two surfaces. It prevents the escape of fluids or gases and maintains a tight seal under pressure.
The car engine needs a new gasket to stop the oil from leaking.
The mechanic replaced the faulty gasket on the boiler to prevent steam from escaping into the kitchen.
In high-performance aerospace engineering, the integrity of the turbine housing relies on a specialized ceramic gasket that can withstand extreme temperatures without deforming.
Perhaps from Middle French garcette (“gasket”), from Old French garce (“young woman”), feminization of garçon.