Copper Grease And Brake Pads
Why do my brakes squeal?
Squealing brakes are a sign of one of two things 1 - the friction material is all gone and you're jamming the backing plate against the brake rotor, or the fit of the brake pad against the caliper piston isn't as snug as it could be. Either way, the squealing is the result of an extremely high-frequency vibration between the pad, the caliper piston and the brake rotor.
A good way to solve brake squeal is to put some copper grease on the back of your brake pads. I stress that the copper grease must be placed on the back of the brake pad - NOT the side that generates friction against the disc.
Copper grease is extremely resistant to pressure and heat and if you get any on the front of your pads, you'll need new pads and discs. The picture above to the right shows a cutaway of a disc brake assembly. The orange caliper housing on the right is missing to show the two silver brake pistons. The idea is that it creates a small pocket of sticky lubrication between the front side of the brake pistons and the back side of the brake pads. Only a minimal quantity of copper grease is required for this purpose. This is usually enough to prevent the high-frequency squeal.
If you are unsure about this procedure or uncertain about any aspect of working with you cars braking system, contact a mechanic for assistance or take your car to a local garage for the work to be carried out for you. Brakes are a safety critical part of your car. This information is provided as a guide only. All vehicles are different, manufacturers should be contacted and vehicle manuals should be checked for the correct proceedure for your vehicle.
Copper Grease has many other applications apart from squealing brake pads. We supply a large range of copper grease products that cater for most needs. You can also learn more about copper grease within this site which will hopefully assist you with future projects.