Got tired of my brakes squeaking. Did not think it was the pad friction material but rather the back of the pad against the caliper. Removed 1 wheel at a time, took 1 pin out of the caliper then pivoted caliper out of the way, removed the pads and coated the back of the pads with Permatex Disc Brake Quiet. Reassembled everything. NO more squeak AT ALL. Both front and back took less than 2 hours.