Tri Fold Bed Cover with Multi Pro Tailgate

[brockhals]

I just bought a '19 Sierra Denali, and I love the truck and the tailgate (surprisingly so).  I add a tri fold bed cover, as I had on all my other trucks, but with the Multi Pro Tailgate, there are added gaps that water comes in (perpendicular to the bed cover, so just a gasket wouldn't cover it).  Any ideas to cover this area and keep water from coming in?

[Rgpie75]

Following.  My BakFlip MX4 leaks a fair amount as well although I'm not sure how much is actually from the tailgate.  I've been planning to add some sort of gasket under the clamp on rails at some point and probably along the front edge of the bed as well but just haven't yet done any sort of research to see what might work best.  It seems like most leak to some extent and mine isn't really all that bad.  Just enough to annoy me really.  

[brockhals]

The gasket at the front helped a lot.  there's probably a 1/2" gap from the bed rails.  I still need to seal the corners a bit more to remove that as a point, but I'm still trying to figure out how to stop the rear from leaking from the MP tailgate.  there's a decent gap there on both sides