Strength: should have enough strength to withstand the extrusion force into the sealed state and withstand high-pressure fluid medium (that is, rubber gasket tensile strength, tensile strength and other physical properties) . Plasticity: by adjusting the formulation so that it is both strong enough to be used and flexible enough to fit snugly against a metal surface under appropriate pressure, the gasket shape is consistent with the groove shape of the sealing plate. Impermeability: a three-dimensional network of synthetic rubber polymers capable of resisting the penetration of liquids with any chemical properties (media resistance) .

Heat resistance: one drawback of rubber in polymer materials is that it results in all synthetic rubber being able to resist temperatures in a relatively narrow range. So it is very important to choose the material formula carefully according to the required temperature. Service life: many new synthetic materials and old models of materials, compared with the characteristics of long service life, which is due to the use of new additives, service life is further extended. In this regard, it is important to select the correct formula of synthetic materials. Stress relaxation occurs in all rubber-based synthetic materials. Due to internal chemical reaction, the initial seal function will gradually decline, and when the seal performance is below the limit, leakage will inevitably occur.