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Microcellular Polyurethane is for many applications an alternative material to compact elastomers like rubber, with many beneficial and unique properties. Thus relates to the progressive load-deflection-characteristic, the amplitude-selective-damping, the good acoustic isolation and the high durability. The dynamic and static performance of the material, combined with the ability to work in limited packages, makes the usage beneficial for many automotive/transportation applications. The amplitude selective damping fits to the automotive requirements: small amplitudes are generating a low damping of the material; high amplitudes are increasing the damping. Translated in the characteristic for bushings and mounts, this results in a very good isolation for acoustic effects (e.g. rough road conditions) and a very good damping of vibrations (e.g. part- or system resonances).