So I have a topper on the truck and travel gravel roads. I got some really good auto weatherstripping and sealed up the tailgate, but nothing wants to stick to the plastic. Looke great after it was done but sure didn't stick for long.
BTW- These plastic boxes sure have a myriad of drain holes all over that sure do suck the dust in. I als have to spend some time wth the silicone gun to plug them.