It's a ~3/8" thick strip of rubber that goes on top of the corner of the rear bumper, between the bumper and the body. I guess they keep the bumper from banging the rear qtr as the body twists and flexes? Bill M 65 Coronet 500 'vert On Dec 18, 2007 9:49 AM, Sean B <polecat2@xxxxxxxx> wrote: > > What is the purpose of this seal? > > Thanks, > > Sean