Home Forums Gear Hunting Trucks and Four-Wheel Drives Truck bed gap in 2018 F-150

I installed a tonneau cover on my Sunday go-to-meeting 2018 F-150 and experienced significant dust in the enclosed truck box after traveling on gravel roads. Installed a tailgate sealer that cut down the amount of dust, but still get quite a bit of dust in the box. I can stand in the box and see daylight along a lot of seams. I can understand the need for water drainage, but the gaps seem to be excessive.

The local Ford dealer says it comes from the factory that way. Anyone else deal with this dust issue and seal up the gaps and maybe leave some seep holes?