They are a type of brake pad made of anywhere between 30% and 70% metals including copper, iron, steel, or other composite alloys. These metals are bound together by graphite lubricant and other fillers to form the friction material. The composition of the friction material varies greatly for different applications according to vehicle requirements. SIM semi-metallic brake pads provide high braking performance in a wide range of temperatures and conditions.
This varies a lot depending on driving conditions and vehicle applications. However, because they provide thermal stability, semi-metallic brake pads tend to last longer than other types of brake pads.
No, they are 100% asbestos free.
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