Impact sound is caused by walking on floors and stairways, for example. The elastic bi-Trapez Bearing® can be used as an effective impact sound insulation measure to mitigate such noise emissions. This vibration isolation system for ceilings, floors and stair structures not only provides effective impact sound insulation, but also a pleasant living and working environment. The bi-Trapez Bearing® is made of a high-grade EPDM material and does not absorb any water. The bearing is loadable depending on format up to a mean compressive stress of 17.4 N/mm² and available in different thicknesses.