For kick panels use a product called Duct Seal made by Ideal Industries and available at most large box hardware stores. There are other manufacturers such GB who make it as well. It is used by electricians and plumbers to seal pipes or electrical where the enter or exit a dwelling. Looks and works just like the original seal applied to kick panels.
http://www.idealindustries.com/prodD...l1=accessories
It comes in a brick and you just use a razor blade to cut it to size, roll it into a rope between your hands and apply it to the kick panel.