SMART BLEND brake finishing treatment is lab tested and proven to stop brake noise at the source. When applied as directed, SMART BLEND'S micro-fine aluminum particles form a molecular bond with the rotor/drum friction surfaces that resist water and high temperatures. It fills microscopic thickness variances and dampens vibrations between the caliper/brake pad interfaces.This micro-fine composite finish eliminates aggravating vibration and brake squeal. Use SMART BLEND on every brake job. For best results, also use Smart Blend Brake Grease #17016 during brake assembly.