I use adhesive backed foam tape around my tailgate. It's for household applications but seems to be holding up ok. Didn't know about the specialized aftermarket stuff.
But there's also holes in the bed that need to be covered or plugged. Regular duct tape is not working there because of the spray liner. Will try some of that Al backed tape next.
2014 ORV Timber Ridge 240RKS,8500#,1250# tongue,44K miles
690W Rooftop + 340W Portable Solar,4 GC2s,215Ah@24V
2016 Ram 2500 4x4 RgCab CTD,2507# payload,10.8 mpgUS tow