High effectiveness and tight, encapsulated engine bays take their toll. Close to the engine, ever increasing temperatures reach well over 100°C. Traditional materials such as natural rubber as well as other advancements like the synthetic rubber EPDM reach their limits under these conditions. In order to withstand temperatures of up to 145°C, Vibracoustic uses silicone.
Silicone rubbers are an exception among all other synthetic rubbers. Their polymer chains are not fully organic, but also contain the inorganic element silicon as well as oxygen atoms. This chemical structure is referred to as a "siloxane chain." It is responsible for the excellent heat stability of these polymers which are consequently used in components for engine mounting and drivetrains.
Silicone has one drawback, however, in that it bonds relatively poorly to metal parts. By employing specific pre-treatment techniques and the latest bonding systems, the engineers at Vibracoustic were able to solve this problem and thus replace natural rubber with silicone for engine mounts exposed to particularly high temperature demands.