Brake shims

Note: These brake shims are designed primarily for anti-squeaking but can also shield the heat. They are made of high strength spring steel coated with high temperature rubber.

It’s normal for the caliper piston to seat (penetrate) into the steel plate and dislocating the rubber coating (stuck to pistons) especially under extreme heat application. As long as the rubber coating is not in contact with the caliper and remains in place the shims will function as it’s intended for abating the brake noise.

You may need to clean the rubber around the piston area and reinstall the shims.

Due to the temperature limit these shims are mainly for street driving and may not be suitable for track applications.