[Lynn Eades]

A brake is an energy converter. It converts kinetic (movement) energy into heat. The heat generated is mostly dissipated through the drum to the air. A small percentage of the heat is transferred from the lining to the brake shoe. If a "medium" is introduced, that is not a good conductor, it will reduce the efficency of that brake. I believe that "good practice" is to bond the lining to the shoe, or to rivet the lining directly to a clean brake shoe. If you are concerned about rust forming between the linings and the shoes, my advice,... have them bonded.