Bed Rail Gap and Sealant Recommendations - with Diamondback SE Cover

[taco.b0ut.it]

I installed my Diamondback SE. So far happy with the quality. From the standpoint of the cover, it is pretty water tight. Though after installation, noticed that my bed rail plastic near the cab was more raised than usual on either side (see pictures). I’m fairly certain I installed their rubber mounts and blocks under the rail correct, it appears that the cover meeting the plastic bed rail and the bulkhead is tight. However under the plastic bed rail there is a huge gap (see pictures). Any recommendations on how to seal this up to prevent water from entering? It appears to be a defect in the plastic bed rail lining itself rather than anything to do with the cover. I understand it’s a truck bed and nothing is ever 100 percent but I’d like to keep my gear as dry as possible. This is on an off road long bed. TIA!

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[Cody56]

On my Tundra I added silicone under the mastic on top of the bed rail. I tried to prevent water entry and channel any water that may enter to continue down the rail toward the back end of the truck where I left a small gap for water to run down toward the ground. I ran one line of silicone under the outboard edge of the plastic and a second line further inboard. That cover doesn't leak at all now.

 

[Sagebrush]

3m VHB tape will solve that problem.

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