Anti-squeal Shims (Brake Pad Shims)

They sit between the pad backing plate and the caliper piston or fingers. They damp the vibrations that cause squealing. Many new pads come with shims already fitted. Squeal can also come from glazed pads, uneven discs or seized slide pins, so shims alone do not solve every noise. Correct bedding of new pads helps reduce noise.

Layers of metal and rubber-like material absorb and break up high-frequency vibration.

Reuse old shims only if they are in good condition and specified for the new pads. Apply brake paste only where the manufacturer says, never on the friction surface.