The dryer was leaving rust marks on our clothes.

After my husband disassembled the cabinet and removed the drum, we used a putty knife to remove the old seal and carefully glued the new one in place. (A 2 man job to do it without leaking glue everywhere.) We then replaced the belt, following the picture sent by PartSelect and put everything back. (We put all small pieces in labeled envelopes so that putting it back together was easy.) Another helpful hint - take a few digital pictures beforehand in the event that you need to see it to put it back together!