The Extang MaxSeal Tailgate Seal helps keep dust, rain, and snow out of your truck bed. The Extang Max Seal also creates a watertight seal on both sides and the bottom of your tailgate. This Extang Max Seal easily attaches to your truck bed with 3M tape to help seal the tailgate area. This is a must have product for any Extang truck bed cover owner or for anyone who has a truck topper, canopy or truck lid. Plus it is very easy to install; just cut, peel and stick.