Stops Brake Squeal By Dampening Vibration At Caliper/Brake Pad Interface. Provides Tighter Fit And Allows For Easier Disassembly. Protects Against Corrosion. Compatible With Anti-Lock Brake Systems. This Product Contains An Elastomeric Polymer For Use With Brake Pads Not Having Anti-Squeal Shims. Aerosol ? Level 3*